15 K sounds steep unless the car was very nice and someone decided to stop utilzing it because they didn't like driving around in a nice convertible. Seems to me you could get a pretty nice restoration candidate that runs for that amount. In my mind, if you are going to have do to a full restoration you might want to look a little lower. I bought my car, sans drive train for 500.00. It had more then the usual Healey Rust. My buddy spent 6.5 k on his BJ-7 non runner and when we compared restoration costs, we were actually pretty close. I had to cut out some really nasty rust and the rust he cut out was less rusty-- but we both had to cut out the same panels in the end.
Lastly, if the body is good, i.e. no major structural repair and you have good doors and only maybe need some dog legs and outer sills, it is probably a good deal.
Heck, just buy it and get started.
Kmeyer
If you posted some pictures I am sure the group could give you a good idea of its worth it.