Good post, Starscream. Honestly I'm a bit surprised at all the hate going on in this thread. People have been saying some pretty nasty things. And it IS easy to pass judgement on something when you aren't looking the person in the face. I know you weren't trying to get something for nothing and that the guy offered it to you for that price. You're in the clear here as far as I can see and it's more up to the step-son who has promised something that he probably shouldn't have. But like you said, apparently the man who died "did" want you to have the bass eventually. So hopefully things turn out for the best.
+1.
A lot of holier than thou nonsense going on in here. I'd defy ANYONE in the same situation to not take advantage of a deal like this. In fact, I seem to remember a thread a little while back where someone scored a vintage Fender from CL at the expense of the seller's lack of knowledge of the instrument and vintage market, and there was a lot of back slapping and well dones being thown around on there.
I say, if the guy sticks to the deal for $200, take his hand off, and I hope it goes through.