I'd be very wary of buying these off Ebay. Last year I bought a car with a Blaupunkt satnav in it, and also wanted the latest discs, so I bought some off Ebay for about 80 Euros (this is in Germany). The guy had good feedback, the discs seemed genuine (he said he had his satnav unit stolen, but the discs left behind). He was in Germany, and the transaction went fine.
Anyway, I bought them, they looked genuine, indistinguishable from the (older) set I had. I used them with no problems for 8 months. Right up until the local police came and took me to the station
It seems the guy actually was getting hundreds of copies of the discs made in Bulgaria, and selling them all over Europe (not just Germany) for all sorts of manufacturers. It took me some hours to convince the police that I did not know they were fakes when I bought them, and I think the fact that the guy interviewing me got mixed up between my genuine discs (which I took along to show him) and the fakes ones helped a lot! At one point they threatened to arrest me for knowingly purchasing counterfeit goods.
Eventually they sent the case off to a local magistrate, who finally ruled that I was 'probably' an innocent victim. But they confiscated the discs and I got a stern telling off.
So if you are tempted to buy these sorts of things off Ebay, be VERY sure you're getting the genuine article from the genuine owner!