If plain colors look at craft stores. They often have them on sale for $3-6 or have 40-50% off coupons and usually have decent color variety. For designs I've had decent luck with teepublic when they have sales (they have one every 2 weeks or so). You can get basic tees for $16. Not super cheap but they have designs for literally anything. I've also gotten an artist account so sometimes I'll design something I want, then buy it. so I get the shirt for $16-20 but then get $2-4 back as my payment. I don't tend to put the shirts in the dryer, so I can't speak to longevity if you do, but I've had some for 2-3 years where the designs are just starting to flake recently. More on reddit.com

It depends what they're listed for, you get to choose your profit, but set it too high and the copycats steal it and sell for less. I normally get 1-2 bucks per sale, but I can go weeks without selling anything (T25) Your mileage may vary. More on reddit.com

I screen print t-shirts for a living and I can share my knowledge and opinions of the brands being listed here.

Gildan shirts are the cheapest "go-to" brand in the print industry. Ideal for average body types. They do tend to be a bit more "boxy" shaped than the other brands being listed. I'm not a big fan of Gildan shirts because they are too inconsistent with their fit. I wear a large, and only about 20% of the time Gildan shirts will fit me great. For Gildan, I prefer the 50/50 cotton/poly blend t-shirts because they are a bit lighter and more breathable than their 100% cotton counterpart.

District Threads are a very lightweight, stretchy t-shirt. They are ideal for skinny or petite body frames. Most of their apparel tends to run a size small, but their "concert tee" line runs about 2 sizes too small. I usually don't recommend District Threads because I prefer other brands in the same price range.

Next Level is one of the more popular brands that is requested by my customers. They have a more athletic fit and tend to have a longer torso without being too "boxy" shaped. Very accurate and consistent with their fit. Their ring-spun 100% cotton shirts are super soft and don't shrink too much in the dryer. This brand is good for people that prefer thin, lightweight t-shirts. This brand makes the best v-necks, they don't stretch out after the first wash.

Bella+Canvas is my favorite brand. Their shirts tend to have an athletic fit with a longer torso, just like Next Level. Their sizes are pretty intuitive, so I would recommend this brand for all varieties of body types. This brand has great color options, and has large variety of fashionable styles for men and women. I enjoy the softness and feel of wearing b+c shirts above all the other brands I've listed. B+C shirts aren't as thin as next level shirts, but they do have a variety of fabric weights available for people that prefer very thin or thick material.

For those saying they don't like how thin next level or b+c shirts are, I would recommend Hanes Beefy Tees. They tend to have a "boxy" fit like Gildan, but they are a soft, thick, 100% cotton shirt. This type of shirt has the least breathable fabric of all the brands I've listed.

Feel free to ask about any other t-shirt brands.

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I went in to see if they had any new merch and was pleasantly surprised to see them selling a 100% cotton t shirt with the new logo as previously it looked like they were only selling a polyester blend. I expected it to be 9 bucks, but was pleasantly surprised to see it ring up for just a dollar. More on reddit.com