Assuming you are talking about a "Corvette only" dealer, I have found that many of these are boutique-type places that buy relatively low mileage cars, then have them detailed out to the nth degree, but the cars often drive like hell and are priced at the highest end of the market. The showrooms often seem to reek of Route 66 signs, James Dean and Marilyn Monroe posters, black-and-white tile floors, too! We have a number of these places here in Texas. What they do is lure you in with a super clean car, on the assumption that a clean car equals a good car. Unless there is something about this particular car that really attracts you (except the convenience that it is there), I would keep looking for awhile. After you have tried a few other cars, you can decide what seems right/what doesn't about these cars, generally, and then come back to this one if you want. In the meantime, by all means try out Ebay.
/s/ Chris Kennedy
Houston, Texas