When I want to buy something I send a note to the buyer saying that we have a communal hallway and things tend to go missing from our mailbox and can they deliver to my mum's instead. Failing that, if my stealth address is in a different town to my real address I say that it's for my son / daughter (depending on what it is) who's at uni and can they send it directly to him / her to save me posting it. Out of 20 something buys I've only had one buyer said no so I didn't bother buying from him.
I use their email address in their contact details to ask them rather than through eb messaging so eb don't have a record of my real address in their system associated with my stealth account.
Call me paranoid if you like but a little bit of paranoia goes a long way  | 
