autochangers

Guys, I have a large quantity of radios and cd changers here that I'd like ot move on. They came to me with the promise of all being working but of course I will bench test each one prior to despatch. So if you are moving a car on, need some cheap tunes, need spares, or want music in your...

My autochanger is screwed ... Now , there are a lot of changers on Ebay , but they all seem to have a different MC number ( Mine is MC 3198 ) . So , the predictable question is , how interchangeable are they ? They all seem to have the same two plugs on the back ( power and fibre optic...