There is a Platium 88 190 on here that is pristine for 12,995 right now. I guess it's worth what it's worth to you. I overpaid a little (11,500) for my 94 190, but it was low hours, had been taken care of and the seller's wife was sic, so I didn't beat him up too much.
Feel the steering to see that it feels good and check tracking to see if it tracks straight. Talk with the seller about maint. on the boat as well as the trailer. Bearings, tires, actuators can add up real quick if they need done.
I agree, the price should be less, but he may have a super nice boat and that drives price. Good luck.
"One foot in the grave, one foot on the pedal, I was born a rebel" Petty