Good luck with your negotiations and survey! I had the same questions and concerns when I was shopping. This will be third year with Blitz, hull # 357, and I have been very happy with the J/30 choice.
I agree with the previous comments on weather helm and tenderness. It is not all that hard to deal with, especially with a reef in the main.
Another item to watch for is core isolation around the exhaust port. I was lucky in that the PO had this addressed many years prior, but even if it is an issue now, it can be dealt with from the inside easily enough. There are bound to be some spots that read high on the moisture meter and hardware that is in need of epoxy isolation and rebedding. A good surveyor can put any of these items in perspective. In hindsight, after seeing how hard it is to remove wet, yet well bonded core that has not started to become delaminated as sounded with a small hammer, I would have put off some of the core replacement work that I did the first year and concentrated on watching things with the meter & hammer, as well as rebedding hardware and sailing the boat!
Good luck!
