Discount retailers have probably been around as long as commerce itself, but it wasn't until the 1950s that a string of stores began popping up in the South that shared a common element: Everything they sold was dirt-cheap. In recent years, the country has experienced a wave of frugal storefronts selling everything from stationary to seafood.

To get a better sense of the activity that surrounds these wallet-friendly outlets, Mental Floss spoke to three employees of Dollar Tree. Here’s what they had to say about stocking their shelves, fanatical customers, and why they spend so much time filling up balloons.

1. Paper goods are the best deal in dollar stores.

You can find practically anything at dollar stores, including frozen food (more on that in a moment), toys, and cleaning products. Assortments can vary widely by store and by franchise, but according to Brenda, the store manager of a Dollar Tree in the Midwest, customers get the best deal sticking with paper products. At least, that's what employees buy most frequently.

“The items that my employees and I purchase at Dollar Tree for value would definitely be toilet paper, paper towels, birthday cards, candy, balloons, plastic ware, paper plates, envelopes, [stationery] products, and the daily newspaper,” she says. At her store, toilet paper and the local newspaper are the top sellers. While the former is a pretty obvious necessity, newspapers at her location are typically cheaper than in other stores; the Sunday edition in particular is up to two or three dollars cheaper. (Like a lot of their inventory, the chain likely gets a tremendous discount for buying the papers in bulk.)

2. Dollar stores know you won't be shopping for too long.

A customer at a Dollar Tree in Chicago, Illinois. Scott Olson/Getty Images

Dollar stores typically have little signage, few frills, and a small real estate footprint (Dollar General's is around 7300 square feet, or one-tenth the size of a Walmart). But having limited space with easily accessible items is by design—the average shopping trip for a Dollar General store is just 10 minutes.

“Planning the store around fast trips is one good way to improve the fast experience many customers are looking for, while also keeping sales high by allowing customers to see many products,” Hank, an assistant Dollar Tree store manager in Canada says. Customers “tend to want to get in and out fast. They are often busy and have other plans for the day and don't want to spend too much time wandering the store.”

3. Dollar stores want customers to feel like they’re on a treasure hunt.

According to Moody’s, an earnings and credit analysis firm, Dollar General rotates its inventory on a regular basis to make customers feel like they need to buy items now in case they’re not around later—perpetuating what it calls a "treasure hunt" feel. That helps the stores compete with online retailers like Amazon, which typically maintains stock of popular products and may not provoke the same sense of urgency in buyers.

Dollar Tree’s approach is slightly different. While new inventory does arrive from suppliers, it’s not as frequently. “When we are doing the truck we get really excited when we see a new product,” Brenda says. “We only see maybe 10 to 15 new things per week out of 1500 items that are coming off of the truck, so when we get something new we immediately cut open the box and examine it.”

4. Dollar stores catch a lot of shoplifters.

You can walk out of dollar stores with an armful of goods for $20, $10, or less, but that still doesn’t deter people from swiping even the cheapest targets. “The shoplifting is ridiculously rampant,” Brenda says. “We catch someone just about every day.”

Oddly enough, the price may help facilitate the theft. “The thing with the low prices is that there is no real deterrent from people stealing since none of the products have any security around them," Brenda says.

5. Dollar stores recommend you skip the steak.

That's a hard pass on the steak.Wamploid Cthulhuloid, Flickr // CC BY 2.0

Shopping for frozen foods at the discount chains can be hit or miss. Some items might be OK: “I’ve had the little pie slices, the sausage and pancake bites, and the Cinnabon bites are amazing,” Brenda says. “The frozen dinners are good as well. People also love the frozen vegetables and fruit.”

But when it comes to unprocessed food, like meat or seafood, you should probably consider a visit to the local grocer instead. “I don’t eat any of the frozen fish or rib eyes because I don’t trust frozen seafood or meat that costs a dollar,” she says.

Nate, a Dollar Tree manager in Minnesota, agrees. “I would never buy the steak,” he says. “I’ve heard from more than one person that it doesn’t cook [well] and it feels like rubber.” In 2016, television affiliate WCPO in Cincinnati attempted a taste test, serving up the four-ounce $1 ribeye along with a butcher's and supermarket cut to some area firefighters. Among the responses: "I guess it was meat" and "It's not terrible."

6. Other stores use them to stock up.

When most everything is a dollar, it’s easy to see why discount chains find themselves acting as a warehouse for local small businesses. Hank says that he’s observed independent proprietors coming in to stock up on items. “There is one man who runs a convenience store and buys boxes of chocolate bars and bottles of soda,” he says. “We also get plenty of event organizers buying supplies in bulk, sometimes hundreds of items at a time.”

7. Dollar stores dread the sight of Hot Wheels toy cars.

While many toys at dollar store locations are of suspect quality, there’s at least one bit of inventory that causes a lot of excitement in aisles. “We get a lot of the infamous 'Hot Wheels Hunters,'” Nate says, referring to collectors of the popular die-cast toy car line from Mattel. “I guess they scour the internet and find out when stores are getting shipments. I’ve had people show up a day after my 2000-piece truck [arrives] and demand I go find the one box of Hot Wheels I got so they can be the first to buy them.”

If they’re polite, Nate will try to accommodate them. Some of the nicer Hot Wheels fans even deputize themselves as de facto employees. “The one guy that is a frequent visitor will take the boxes I have and stock them neatly on the shelves while he looks for what he wants," Nate says.

8. Dollar stores sell pregnancy tests. And they’re reliable.

The pregnancy test is one of Dollar Tree's most popular items.Amy Meredith, Flickr // CC BY-ND 2.0

If you’re wary of the accuracy of a home pregnancy test kit that costs $1, well, you probably should be. But according to Nate, his store stocks a reliable brand. “The pregnancy tests we sell are the same ones used in most hospitals,” he says. Most all pregnancy tests detect a hormone called human chorionic gonadotropin, or hCG, which is produced during pregnancy. More expensive tests can detect lower levels earlier in a pregnancy, while cheaper tests—like the ones in dollar stores—might not register a positive until a woman is a little further along.

But they're still effective. And according to Brenda and Nate, they're also among the most-stolen items in their stores.

9. Balloons keep dollar stores aloft.

Most Dollar Tree and many other dollar store locations have a counter devoted to mylar balloons intended for birthday parties and other events. That’s because the low cost and easy storage of the un-inflated balloons makes them a very profitable endeavor. “Balloons do a ton of business for Dollar Tree,” Brenda says. “A ton. Especially for big events.”

In a given week, her store might sell 150 to 200 balloons: “If you think about it, every day is someone’s birthday, baby shower, graduation, or anniversary.”

10. Dollar stores might warn you away from a bad deal.

If you’re on the fence about whether or not a dollar purchase is worthwhile, you can always ask an employee. They might tell you if it’s worth the cash. “I know that the quality of our products is not always the best and I obviously am not going to constantly bring this up to customers, but I am not afraid to give them a bit of heads up when I know a certain item is especially poor, or could be found much cheaper at a competitor,” Hank says. “I know that the company will survive without those couple sales, and I prefer to make customers happy over adding a few more dollars to the wallet of the company.”

11. The dollar store manager is often overworked.

Dollar Tree, Dollar General, and other chains have come under fire in recent years for tasking store managers with a lot of responsibility in order to keep the costs of staffing low. According to Nate, that checks out. “In my district, they are trial-running having the stores unload the semi-trucks instead of the drivers," he says. "But they won’t give us the hours to add an extra guy, which means I’m the manager on duty while being in the back of a semi throwing 1800 cases."

12. Dollar stores can’t keep Donald Duck on the shelves.

Customers won't find many familiar faces at a dollar store, but they'll always have Donald. Ted Eytan, Flickr // CC BY-SA 2.0

In stores filled with a lot of unfamiliar brands, customers like to see one recognizable face: Donald Duck’s. The Disney character is front and center on Dollar Tree’s orange juice, and his smiling bill is one of the most popular items in the stores. (The drink is produced by Citrus World, which owns the Florida’s Natural label and licenses the Donald imagery and name from Disney.) “The Donald Duck orange juice is our third most-sold item,” Brenda says. “To be honest, I’m not sure why it’s so popular. A lot of people stop at our store on the way to work or wherever, so it’s kind of a quick pick-up.”

A version of this story ran in 2018; it has been updated for 2021.