The boat I'm looking at is:
Very low usage, stored out of water
90HP mid-90's Nissan fuel injected
15HP kicker
GPS, fish/depth finder, Down riggers, radios, newer trailer
A Classic 22 can be worth anywhere from around $15k to somewhere in the lower $20k's depending on condition and equipment. In my opinion, the one you're looking at is worth the $18.5k easily!
The only proviso at this time is that prices in general are depressed in the boat market with the discretionary $ being hard to come by, but even at that, the boat you're looking at would be a good deal.