I was recently a victim of an internet scam, involving bikes, which was highly intricate. Though not directly through ebay the 'company' used that to start with. I know of at least 6 other unlucky souls in the uk had by the same scam. Be wary as the scammers are getting more clever by the day, even setting up bogus bank accounts, freight company websites and fake testimonials etc. The people that did me even passed a solicitors check done by my sister (head accountant of a local company) that showed they had been trading legitimately for nearly a year with no problems. A bit of advice I can offer is that to always check the headers of emails in correspondance with any suspect purchase etc. Look for web based email, or an address (IP or email) that changes from mail to mail (right click on email, select properties, show header). This was mentioned to me when the internet fraud squad got involved. Otherwise the advice given on the bid history from the item above is spot on, and I only wish I had had the oppurtunity to read that a couple of months ago!
IF IT LOOKS TO GOOD TO BE TRUE, IT PROBABLY IS!