Next, some of these expired domain names have ranked in high authority sites that are ranked or had ranked themselves. Besides, some of these domain names are worth a fortune. For example, domain names sell for about ten to twenty dollars each. However, those that are the most sought after can go for over $ 2500 a month because they have lots of traffic back links or rankings.The last advantage is that you don’t have to spend much to find expired domains.

If you bid at NameJet *after* the domain name moves to Pending Delete status, then it’s too late for NameJet to take advantage of their relationship with eNom and take control of the name. So then eNom thinks, “no interest from NameJet users; we’ll just drop it” and it goes through the regular deletion process — where the fastest fingers can register it. In some cases, investors don’t want to pay the $59 or $69 fee at NameJet and if there are no bids they can likely get it for $18.99 at Pheenix or using other dropcatching services.
Here's an old post on search engine roundtable that claims google's policy is to discount previous backlink juice when a domain changes ownership.  I'm not convinced whether this is actually true or something Google says to discourage excessive domain buying / 301 redirecting for SEO benefit.  The comments above seem to give varying opinions on this matter. Would be great to get to the bottom of that one!
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.
Domain names expire when someone decides to stop renewing it. They may not be available to register immediately. We update the search index every night, so some names may already be renewed or re-registered. Some may become available in a few days. Some registrars, like GoDaddy, will let you buy a name that one of their own customers expire immediately. When you find a name you like, just click on it to try backordering the name!
The way this list is implemented means I can't update prices, nor removed sold domains automatically and sedo doesn't provide me with the tools I need to implement it properly. Unfortunately some users keep contacting me to update their domain prices or remove their domains and I can't keep doing that manually. So I've decided to disable the list for now.