Chris,
Take a look at
http://www.boattraderonline.com
That will give you an idea of what they sell for. Currently they have a 1992 in Columbus, Oh. for $29k, a 1990 in Ft Lauderdale for $27.5k and a 1990 in Allen, TX for $37.9k, has custom paint. I did not notice any that had repowered to the 502s.
You can also used the NADA on that site to calculate the value, A quick estimate I performed looks like low retail of $28K to average retail of $35K.
JimmyBaja
