I removed my radio and fitted a double din Pioneer unit. I've just got my radio sitting here and still see that they go for decent money. Where do i get the code for it?

You could try the local dealer or there should be someone local to you who could decode the radio i'd have thought - maybe do a search on Yell.com.

I had mine decoded by a local guy - cost me £15.

What happens when you want to sell your car and keep your pioneer unit?

The cars ecu automatically recognises the std radio and decodes it straight away. You just need the code for fitting it to another vehicle!

What happens when you want to sell your car and keep your pioneer unit?

Indeed