I had a 340 pre-buy inspection done in Phoenix in May at Falcon Field by Mike Moore at Moore Aviation Services. Mike comes across as a very nice guy who can do a good job for you and he’s fairly cheap, but I wouldn’t go back. Just as an example, he missed a crack in a torque tube, same place they all crack and not even the side that requires a mirror to see. Over 8 grand in parts and labour. I can’t help you on where to go since I’ve taken the airplane back to Canada. If I had to do it over I would give Mike Busch his fee to manage the pre-buy as he knows which shops to avoid. Good luck.