I have 10 new fabrics. I've participated in a couple swaps now and have not received repeats from different swaps (however, I received duplicates during a single swap, many more with the January swap than previous one).
I scour the remnants section for small cuts of fabric, as well as the fat quarters section, specifically to find fabrics to swap. I also try to combine great sales with coupons and then buy a 1/4 yard at a time so that I have something to swap. I am making donation quilts for children, so gathering different fabrics isn't an issue currently as I know they will get used. If I run out, I may have to sit out a swap or two.