[racer]

There is no hard fast rule on prices. The cars are all old now (20+ years) so judging mechanical history, color, overall condition etc are the more important players to come to a price. Also depends how handy you are when it comes to fixing stuff.

I'd look here, rennlist, craigslist, ebay, local city paper.. look everywhere you can think of. There are some resellers more reputable than others to consider as well. Not sure how many cars you will find "local" to you, so be sure to consider costs to fly/inspect/transport etc if needed. Also keep a 10-15% cushion, of the purchase price, available to help "fix" or "improve" any issues in the car you do find.

At least 4 years ago a general rule of thumb for the SC/3.2 range cars is that they "are all $20K cars.. just depends on how you want to get there"

I'd try to drive as many local samples as possible, even if you know you won't buy them, to get a better feel about the cars and how different samples can be. Since you seem a bit open to style (coupe, cab or targa) you might find yourself willing to go beyond the '87-89 year cars if the "right" one came along. SC's, early 3.2 and 964s all seem to overlap in the $10-20K price range these days.

BTW, what is your price range?