...and they're selling in British Pounds (GBP), but listed their location as United States (Apple PowerMac, United States, to be accurate). But hm, look at the seller's feedback! Either they're clueless about Macs (or just plain clueless in general 🙂 and really do have a preordered G5 up for auction somehow (and couldn't find a legitimate G5 pic anywhere on the Web?!), or IMHO more likely...
Someone's eBay account got cracked, and the cracker is having a bit of nasty fun at the rightful owner's expense. Perhaps they want the acc't owner to get pounded with perplexing email (note also the "preapproved bidder" requirement demanding that you email the seller for approval to bid!) about this embarrassment of an auction. I really don't know; this one's an odd duck, 'specially with the seller's wealth of positive feedback...