Really no way to determine what price to pay based on web photos. For every person that gets a great buy off E-Bay or some other museum/dealer, there are 100 that are grossly disappointed buying sight unseen. I wouldn't even buy a brand new 2015 car based on web photos. You never know what you'll find when you see it in person, and usually dealers like to rope buyers (that shop off the web) with their flawed cars.
The 39,000 mile Firebird is interesting, but again, that could be rolled over to 139,000, or it may have had 39,000 harsh miles in a snow belt state, or 39,000 miles driven into the ground, restored in the 1980's, and now looks like an original, with patina.
$28K for a ragtop is not out of line, but again, you HAVE to see and drive the car in person.
Sellers can ask whatever they want, and sometimes that one buyer just falls in love with the color or overall appearance, and it sells. Others will sit on their cars for years.
