I don't meet ANY of your requirements scove but I did look at several when in the market some years ago as well as doing some research. Just a couple of things to help you out:
1. MOST of the Whitby's had screwed and glued hull to deck joints. Through bolting was an option. Look for an "option" boat!
2. The Brewer 42/2.8 is a very similar boat but built a bit better and a better keel. Look for those as well.
3. The boat is a solid bluewater cruiser with good room and middling sailing performance as one would expect.
Hope this helps a bit. Condition will be the key of course. There is a whole thread on the boats here: