Your right. the Ebay seller are breakers and they are still asking between £400 and £500.
however i did find this:
http://www.ebay.co.uk/itm/BMW-profes...item4d078e553c
Do you think this will work in a UK BMW.
Why did you sell your head unit. I'm wondering if you have fitted something better that still makes use of the OEM sat nav screen.