I have the old seats out of my 72' a local guy who's a buddy wants them for his maverik. He offered $80 for the pair, I found a set on FleBay for 250 in much worse shape then mine but no bids. Whats a fair value for them so I don't get totally screwed or am asking way too much for them.
Typically I think the Mustang original high back seats with all the mounting brackets are worth about $20-40 for a pair with normal wear. If they had been disassembled, blasted, repainted and all new upholstery and foam added they would of course be worth more. I think at $80 you are getting a good price based on the photo. You could get a better pair of buckets from a modern vehicle from the junkyard for that price.
Edit: if anyone wants to pay $100 + shipping I have a pair of high backs from a '70 I'll sell you.