Survey
In my opinion getting a survey would be overkill. Very few boats in that price range are surveyed. Also, don't expect a boat in that price range to be perfect.You can tell a lot just by the overall appearance how well it has been maintained. Also, are there extras with it, motor, trailer, docklines, required safety equipment and etc? If your dealing with an established marina I'd put a lot of stock in what they have to say about the hull. $1500 certainly isn't worth damage to their reputation.I'd recommend finding someone with a C22 in your area to check it out with you. C22 folks are everywhere......just post right here and ask for help in your area. Most know their boats well and are very helpful.Good luck,Jon