Agreed a sale then sent me a payment address 20 minutes ago saying pay 2.5 BTC today, after you agreed the sale. I hope there was a legitimate misunderstanding with you there.
Scammers create fake accounts that are similar to the seller. They then watch the sales and send a fake "You won the sale, send payment here" to all the other bidders.
It was the same person who asked me to make payment today to a bitcoin address untill I mentioned it on this thread. After I mentioned it on this thread I was told the bar was sold. this was 12 hours after the sale was agreed. As I said I hope it was a genuine missunderstanding
Could you post a quote of the PM you received out of interest.
& thanks Yankee for agreeing to act as escrow on this, the tip will be on me this time :-)