Thurman, I'm going to offer a little advice here. Something I'm guessing you're figuring out very quickly.
When it comes to boats, there are few, or no "bargain passagemakers" out there for sale. If and when they come on the market I'm certain their time on Yachtworld is measured in days, or even hours.
The boat you made an offer on was just too good to be true. A 50+' passagemaker, in good shape for an asking price of >150K. Something had to be wrong. The boat is just too cheap for what you'd be getting.
I'd look at boats, then figure out the "average" listing price for an actual good condition vessle of the type your looking for, then buy the best condition example you can find.
I know this might sound redundant right now, but it is true, and experienced boat buyers know it. Yes there are bargains out there. You'll see them listed on YW and then they are gone. I'd venture to say that the best bargains are the ones that never make it to YW.
Best of luck boat hunting. Every failed survey is a lesson learned. And in big boats the lessons are never cheap.