Someone wanted it posting and transfered the cash to his bank account.
Turned out someone had hacked somebody's bank details and the
transaction was reversed after the item was posted.
Have always found Gumtree good for selling furniture, kitchen appliances
etc. The bigger bit that never sell well as 'Collection Only' on eBay.
There are a lot of scammers on there though. A mate of mine was tucked
up selling his iPad.