If you advertised the bike at $75 and have a buyer, then now is a little late to be getting an appraisal. That is the kind of thing that those of us who look for old bikes hate, sellers who change their minds. But if you put the ad out there with a 'Best offer' that's different, of course. And I'm pretty sure you will get a better offer than $75, esp now that the worldwide conspiracy, I mean membership, of C&V knows about it. It's a nice bike but don't imagine it is a gold mine. On the other hand flat or blown tires are *nothing* to someone knowledgeable about old bikes.