If you buy a dropped domain from Snap or Namejet, the backlinks seem to be worthless for SEO. They are valuable for traffic if it's targeted to your site. Go ahead and 301 redirect into your site because it's the traffic from the back links that is worth something. I use the Google URL builder to redirect these names so you can see the domain the traffic is coming from.
Something similar happend to me in an auction a couple of weeks ago, I won the item, I paid for it, got an email with receipt and all, and then the next day they took it away from me and got the refund.. I know it sucks…… Some auction sites take a lot of time to upgrade their auctions, and this complicate things to, u can win an item in sedo, and still be listed in go daddy or vicceversa, sometimes it takes them days, I once called go daddy and told them, “hey! That domain in auction is mine” , “oh, sorry we haven’t upgraded”..
Internet Marketing is one of the best fields which have a great output potential, but using suitable tools for different tasks is what make it interesting. For newbies, it may not understandable, but for professional internet marketers, tools are everything. Among many tools of SEO (Search Engine Optimization), expired domains finder that finds expired domains with already build matrices are most attractive things. Online marketers are well aware of the fact that time is everything, so they try to find domains that have already great values to spare their time.
Thousands of domain names expire every day. The reasons are different. Some owners forgot to renew the domains, some just don't want them anymore or they moved on to other projects. For most people these so called Expired Domains don't have any value. They just see a bunch of Domain Names someone else deleted and move on, but for the people who know about SEO or the value of good Backlinks, Expired Domain Names are money just waiting to get picked up from the street. The only problem is to separate the good ones from the bad ones. That is where ExpiredDomains.net comes into play.