How much Should I sell my boat for?

It's a 1990 Reinell 18ft funruner, Red Newer engine, about 30 hours on it. The only thing is that it's been sitting out in the middle of a vacant field without a cover because it blew off and I don't know what damage has been done to it. I live in a very hot dry area. It's always been a good boat, had it for 5 years never ever had any problems with it. We used it to go water skiing and stuff like that. I looked on NADA and it said $4,420 But I want a second opinion.|||Depending on the condition, 3500 to 4500, with the current market, closer to the low side.|||look at BUCnet.com, it is the actual price boats are selling for and not market value, will give you a better perspective.