I have a complete A500+ with some battery damage. My brother did change the battery for a coin cell type but obviously didn't do a proper job of cleaning the did since I just found it doesn't work and after opening the case their is still corrosion.
I don't have the time or money to build a new board at the moment so I'm open to offers if anyone wants to raid it for parts. Ideally I'd like to sell the whole system because I'll have no use for the rest of it. I also have a 1MB upgrade board and an MTEC 68020 board available too.