Thanks for the advice all. The Tartan owner came down another 2.5k in price after all. That put it in the range that my surveyor called a good deal so I agreed. I also got a kayak thrown in! Next up will be my list of projects for this boat:
1. Fix the deck - I will hire this out.
2. Add shore power
3. Add 30W Solar Panel
4. Roller Furling Head Sail
5. Auto Pilot
The A4 was in good shape so I hope to get several years out of it! Man, buying a boat is so much more dramatic than buying a car!