I noticed a common theme with the auction house and will be staying away from that feature. I emailed Starfire and was surprised to get a quick reply...
It's a bug, thankfully 80% of the time caused by using a money exploit rather than through normal gameplay...
Thanks for the mail, we are aware of some issues regarding the game where the code monkeys seem to have dropped their spanners, so we have sent in a highly skilled team of monkeys trained for the job of retrieve the dropped items.
There should be a title update coming soon which will resolve these issues and also we hope reverse the issues regarding cash that have made some profiles a little difficult to play. I am sorry I cant give you an exact date on when it will be due to Microsoft certification processes etc. We are also very keen to see it resolved. For more up to date information you could follow Starfire Studios on Facebook.