99% of people can see it coming, but maybe 1% are new to the internet and naive enough to believe it or just too greedy to see it. Send out that email to every low-feedback ebayer selling a computer and a few will bite - and at £350 a time he probably makes more money than me
Nothing new, really - "Uno sciocco e il suo denaro son presto separati", as they've been saying for the last 500 years

Still, always worth a heads-up
Daysleeper - that's a cracking story. There are some good 419 scam-the-scammer tales out there too.