I actually buy a lot of fabric on Ebay, especially inexpensive FQ and the like. One of the sellers I buy from packages 4 FQ for $4.00 and will combine shipping, making it a great deal.
I've also bought 10 lb boxes of fabric, and I got over 100 different fabric pieces varying in size from a Fat eighth to a yard and a half!
Selling bargains like that might be a good option.