I just gave DomainOutbound.com a try, and was quite pleased with how things went. I selected a two-word keyword .co.uk domain and asked for a lead count using the keywords. DomainOutbound.com got back to me with the lead count, name servers to change my domain to, a dedicated email account for the process, and a control panel that includes detailed stats. The campaign was sent out. 53% of all emails were opened, 54 people clicked through to the landing page (which is essentially an offer form), and 21 people replied. I ended up receiving 1 offer through the offer page, and 7 inquiries as to price. After some negotiation, the domain ended up selling to one of the prospects for £300. I'm pretty sure the domain would not have received a £50 opening bid on DomainLore.co.uk. Everything was handled very professionally by DomainOutbound.com, I'm happy with the sale, and have already started a second outbound sales campaign.