This SLK is really only notable for its number plate. It could be worth as much as the car. Here in Oz number plates change hands, or cars, for huge sums of money. If you're into cars, you're probably interested in number plates too. This site http://www.rta.nsw.gov.au/newsevents/2008_10_auctionresults.html from October 2007 will give some idea of the prices that plates reach here in Australia. For comparison, a Boxster S is about AUD$140,000.