But from the buyers point of view (i haven't sold anything on ebay yet) i feel safer not 'held to ransom' anymore buy the seller.
It used to be that the buyer had to leave feedback first, which isnt right since the buyer has already fulfilled his end of the bargain by paying, and if you left negative feedback, it would most likely be that the seller would leave you negative feedback, which isn't fair.
Rather than what they have now, a seller unable to leave negative feedback, they should make it the seller has to leave feedback first before the buyer does, that way you can still leave negative feedback if they dont pay etc...
It's swings and roundabouts really. There's always gonna be something wrong with it.