I have no idea, but am just speculating that there could have been a scammer involved in the first auction.
This happens a lot.
I sold a car for my brother on ebay and the minute the bidding ended, I got a call
from an unrecognized phone number, that was not visible to my phone, from a US based "buyer's helper".
I also got email from the buyer in Brazil who insisted on using paypal.
What happens with these scams is they want to make a payment, get the car and the title from you before you realize the paypal transaction is invalid.
Then you're left with nothing.
Fortunately, I was aware of their plot and insisted on a cashiers check and that the car stays put until the funds from that check cleared the bank.
Or maybe the first buyer just didn't pay up.