I would ask them what their price is then negotiate. They can either negotiate the price with you, put an ad in Craigslist and possibly sit on it for awhile. How recent is the newest piece? If some of that fabric is 10-15 years old I wouldn't give any more than a $1.00 a yard. If some of that is that old it is definitely going to need laundering and checked for mold and mildew. In that case you're going to have to figure that cost in also.