Years ago I listed an Atari "Le Mans" that I restored. I had two bids fro two different bidders. The first bid was from one of their eBay accounts (but I didn't know at that stage). The next was the winning bidder - a really nice Video collector in Tullamarine. He won the item and took it later that week.

Three days later, a message appears from a "Jimmy" - who was disappointed his INITIAL bid was not highter. But it was not the same eBay name. He bidded under one eBay account and messaged me under a different eBay account, but he was the same person.