I would think it through before making an offer. Do you have space for that much fabric? Are the colors and prints to your liking and style of quilts. You do have to think about age, even stored in the best of conditions some of the fabric is old and may have issues (fading or even weakened). I use a lot of vintage fabrics and I will tell you they can be hard to match. Even if the colors are current, the tone or hue can be different. I usually pay $1.00 a yard at yard sales and I have lucked up on a quarter a piece and some of the pieces were several yards each. I use coupons at Hobby Lobby and Hancocks so I usually pay less than $5 a yard new. I think the biggest question is, "Would you actually use the fabric?". Could you look around on CL and see what fabric in your area is going for?