Hi Larry,
You have to be careful with stuff like that as you never know to what extent that you will have to go to repair them for a return. Some common made equipment can be fixed pretty easy due to common made parts but what happens if there are custom made ASICs in the unit that are only available from them and if they are $500 a piece or not available at all?
I would do one and see where you end up and then if that evaluates well then you can jump in with both hands. If they were easy to fix, chances are someone would have jumped on it already- but that is a guess.
I am willing to help time permitting. If they are 50 cents a piece then at least you can get them for parts.