NameBio did an interesting bit of research into what was the best day of the week for your domain auction to close in order for you to get a better sale price.
They researched over 175,000 domain name auction results to reveal the best day of the week for your auction to close on. Their research included Namejet, Flippa, Godaddy and Sedo. While results varied slightly according to the auction venue the results were similar. The best day of the week for your auction to close to maximize your price is > WEDNESDAY!!
For more detail from Namebio on their research and results, visit their article link here.