Ic thanks johname, so apart from one combination being bit better than the other, the main difference is basically end user price v reseller price (big difference though!).
When you say "you never know when that ideal buyer comes along", what are the chances of simply waiting for the end user to find you (say linking from the actual website/forwarding the url to the sedo page with your offer), as opposed to actively seeking the buyer? Would you say it is 50/50, or does active solicitation increase the chance of a sale significantly?
I also read in some posts here, that some domainers prefer to wait until the end user contacts them, because in that situation they would have an upper hand.