Found two classic Fila tshirts and an Old Navy tshirt at the thrift stores.

I always have a look in the men's tshirt sections whenever I go in a thrift store. I've many times found classic Old Navy, Nike, Reebok, Adidas etc tshirts and the majority are like new condition. For $2 to 3 each you certainly can't beat the price. I highly recommend checking out the thrift stores tshirts if you never have. They may be older, but they still look damn cool! :-D