Is that Flea Market still going? Got some good things there cheap, like Maxine Brown Epic LP, but it was a long time ago now - at least 15 years.
I'd be surprised if you find much 60s these days, what with everyone going over there so often. The good thing when I went to the shop in WPB (again at least 10 years ago), was that within an hour of talking to the owner these other collectors came in with their sales boxes and there was some interesting sweet soul stuff in them boxes. In the lock up it was v v hot and dusty, and the spiders put me off, even with me gloves on I was worried about getting bitten. The owner was pretty clued up, knew the main UK dealers etc.