I spent about $400 on mine. Asked around a lot, and talked to a lot of different upholsters. I knew I had found the right one, when she pulled out about 10 books of fabric samples, and didn't try to rush me in picking out what I wanted. Also, I found out the bulk of her business was restorations and old muscle cars, which I think was a plus. She was used to working on these type of vehicles, and not just someone who fixed cigarette burn holes in civics.
