[Ryank]

Again best advice I can give is take what you think you will spend, in this case I think you are thinking around 2200. Then Double it, so you will have $4400, plus the cost of the boat, (I would offer 600 unless it seems really sturdy with no floor issues and a transom that would go another 3-5 years. Then I might offer 700.
For 5k you can find a nicer seacraft with a good engine and better trailer and probably electronics.