Challengers were built in Costa Mesa Calif. by Howard Stern (not the shock jock). If it was well maintained it should go for about 19,000 to 30,000.
It is a good off shore boat and will handle more weather than you can.
It will pay to have a very qualfied Marine Surveyor look it over.
There are not many for sale as the owners keep them and hand them down.
I dont I dont think there were more than 200 32's built. Mine was hull #52.
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