There's a subsect within the Chancers/Beggars sect and they are cold heart of day regretful buyers. Usually the denizens of ebay, I found them an extreme annoyance. Pleading emails to cancel the deal, to those guys who said 'Yes, I've changed my mind. You haven't shipped it yet, so refund me. If you post it, I will refuse it and open a case against you.' Thankfully, the one time that happened the sale was only circa £100 but that was a ruse I had never encountered before.
Men bleating that their wife/GF would go nuclear as the purchase was made from their account (yeh, right!), or just pleading to cancel the sale because they 'really wanted it but can't afford it'!