2 speed power glide

[Steelrat]

a local guy flogging a 2 speed power glide, he just wants to get rid of it, does not know what it is worth. It was rebuilt 3 years ago and has sat in his garage for even longer 2 tq converters included. He believes it came from a big block buick wagon.
I do not want it for my car, but if I can scoop it cheap and resell for $ to put towards my tranny then maybe interesed. What do you think it is worth? Anything I should look for to assess what year it may be, etc?

Thanks,
Shaun