Daily Mail reader are we?
If someone wants to knick my landy they will. I'm not going to sit barricaded into my house, cradling my shotgun living in fear that everyone I transact with on the internet/ under 18 years old/ looks dodgy is going to come round stick a knife in me and rob me blind.
95% of people on ebay are like you and me. It wouldn't be the worlds' largest internet auction site if every other transaction ended in a robbery ffs!