Well, after the auction had ended I received a question from another ebay member asking if I was the real seller of the Amiga as they had seen an identical one, with identical description, on ebay with a different item number. They included the link to the ebay listing in with the email. But this was from an ebay member so it all looked normal. I clicked on the link to see if someone had used my photos or something and the listing was for something completely unrelated - a pair of hi-fi speakers. So I thought nothing more about it, but it niggled me as it was "a bit odd". Looking back, this must be how the Scammer got my login details - the link I followed must have captured my info somehow.
Not somehow, but with a spoof website that recorded your login and password. The spoof website link was disguised to look like valid ebay link.
This is the "industry standard" scam, and it works alarmingly well.
See
Ebay: Spoof Email TutorialSimple rule: If someone wants you to log into ebay, paypal, bank, whatever,
always type the real website URL to the browser address-bar yourself. Do not follow any links in emails.
