owlvamp, I have purchased charm squares from E-bay several times and have been happy with them. Most often they end up being from a place called Emerald City Fabrics. Sometimes it is a specific charm pack with 40 or so squares in it and other times the have been lots of 100 squares. Just read before you buy. Even with a standard charm pack of 40 or so squares that gets you almost 4 full sets to trade after you cut them into 2.5 inch squares. There are also some packs that are alreadh 2.5 inches. You should be able to find something you like. And remember, you don't have to have 15 sets to trade. 15 is the maximum.