Very clean layout. It needs some color though. It's 99% black and white.
I don't understand the logic of including the Flippa ticker and Godaddy banner.
If the purpose of this site is to sell the domains listed, why distract visitors with links to other marketplaces?
I would also rewrite the following "in bold" on your FAQ page.
Is it required to have a GoDaddy account?
We have a great relationship with GoDaddy and are extremely familiar with how their process of transferring a domain name works. We do not REQUIRE you have a GoDaddy account, however, if we transfer the domain name to any other registrar the process can take much longer and complications can arise which we may not be able to immediately resolve. It is highly recommended you use GoDaddy to receive your domain initially; after the domain name is in your GoDaddy account, you can transfer it to any registrar you wish.
I don't think it will help to build trust in your site. I understand that you want to push domains to other Godaddy accounts instead of dealing with transfers but I think this statement will only raise doubts about the entire process to prospective buyers..
Why don't the domains forward to your site? The few I checked go to DNS sales pages.