If sold by itself, I've seen them go for anywhere between £80 and £180 on eBay UK. An original box and instructions will help increase the value. Most of the recent SX-1's on eBay have been bundled with CD32's and lots of games. This is a bad idea because it makes shipping costs astronomical, and most people who want an SX-1 will more than likely already have a CD32.
Steve.
