When you list a domain name for sale on Flippa now you’ll see a recommendation right after the listing goes live to maximize your offers using their domain sales page. The page looks like this, and all you have to do is change your nameservers to get one once you auction is live:
While you can’t change the look-and-feel you can change the text on the page to make it your own. I’m going to try this for a name that I just posted on Flippa in a 23 day auction. I’ll likely leave it without a sales page for the first half of the auction and then see if more offers come in if I update this halfway through. A small test, and one that I’ll need to repeat with a few dozen domains to really get some meaningful understanding of the impact but it’s interesting enough to try IMO.
Have you tried Flippa’s domain sales page? If so did you notice that it helped to bring in more offers?