I sold a domain in 35$ some days ago. That was pretty nice domain but was expiring.  I didnt wanted to renew because that was registered in Godaddy. I was actually trying to get rid of Godaddy. So, I sold the domain in 35$.
              When I was cleaning my spam folder I noticed a email with the subject of my domain. Somebody was offering 90$ for the same domain. The email was arrived a day before 1 day of the day I sold the domain. Damn, I lost 55$. Thats not really a big sum but it can be happen in the bigger deals also. Now, I think I will check the spam folder at least once.No, I would actually delete that fucking spam folder if possible.