In order to make an opinion could you tell us how much money you have into the boat. When was the boat bought and for how much? How much have you spent in MAJOR repairs and or replacement items? What condition is the boat in? What kind of REAL money is this boat getting in today's market?
Generally speaking I probobly wouldn't put that much more money into it unless you think you can get it back. So if you see your stinger selling for $10K and you see ones in better shape going for A LOT more then go for it. A lot of people would probobly disagree and if I had the money I'd probobly feel the same way.