I don't think anyone searches Sedo, except domainers. Sedo makes sales via partners, and agents of registrars.. No enduser would go there and make a search, and if they ever do , they would be disappointed with irrelevant search results.
All marketplaces are extremely arrogant, and don't improve their business, because all concentrate on manipulating leads, instead of better serving buyers and sellers. For example if you let a domain expire and not own it anymore, if there is an offer, you can't remove it without responding, and if you respond, you have to wait for 1 week. So you need to counter an offer as if you really own the domain. But if your counteroffer is accepted and paid, you are guilty.