Try traderonline.com
That's how I found my 88 H23 four years ago. I paid $5200 with the trailer but I've seen H23's advertised as high as $9,000.Most hulls should be in decent condition, but check carefully for blisters if the boat was kept in the water. In addition, look closely at the sails, outboard, trailer and tires, cabin windows, chainplate bulkead and interior. These will be expensive or time-consuming to fix or replace. So is bottom paint if you're planning to keep the boat in salt water. If you're not up to the task of fixing these things, don't buy the boat...no matter how good it looks. Other things that will affect the price include extras like roller-furling jib, GPS, VHF, tillerpilot and bimini. Good luck.PeterH23 "Raven"