I've got the 3a somewhere, I think, and it still works, I think, with a spreadsheet rom, and some solid state memory battery backed up of course
+ some other stuff, I think.
I know there are a lot of 'I think' in there, but I'm not sure where it is + I may of given it to my daughter ages ago
but I may still be able to get it back
I also have the Revo and somewhere an original series 3 (broken) + books.