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!
"Expired Domains" will help you grab and search through all those domains that are expiring in a organized matter. You will be amazed how many good domains are expiring every day. With Expired Domains you should be able to find a domain you are looking for. It may take some time, and you should not expect to grab something like credit.com. Sometimes you will also need to use a backorder service to assure (as much as possible) that someone who aimed at the same domain as you doesn't grab it before you does.
We just need to take the Archive.org url and plug it into the Dom Recovery software and again, if you just hit recover, paste in the snapshot, click next, next, finish, and I’m going to let this one run in real time for you so you can see just how quick it is, and right now it is downloading the initial page, and now it’s downloading all of the other pages.
DomCop has a great offer that all of you buying expired domains should consider. For the price of a couple domain names, you can use DomCop for a month, snag some excellent domain names, which would otherwise cost you thousands of dollars. If you're considering expired domain software and don't have the knowledge to program your own crawler, I'd lean towards DomCop.

The bottom line is, drop domains deliver traffic. How come? When people register a drop domain and build a website on that domain, they often attract backlinks. They also can update their website and generate a community or a brand. Whatever the case is, there are four things that happen that results in traffic for those websites. They create a backlink footprint, which drives direct traffic. This backlink footprint also produces SEO benefits. The more these website owners promote their website, the more goodwill they build up in their target niches and online communities. Finally, the more they manage their online blog, website or information site, they gain some sort of presence on social media.
By strategically buying expired domain names which have certain quality features, you can create a link "pump" to your target sites. From an SEO perspective, this can turbo charge your rankings on Google and other search engines. Also, you can make money directly by promoting products on high ranking search results. Additionally, you can make money by selling links on your network to people looking to get an SEO boost.
A brand new domain, for instance, will have to wait for a few days before getting indexed by Google and other search engines, and then its owner will need to go through the tedious process of search engine optimization, which takes time and financial resources. High authority expired domain names on the other hand, offer a short cut and allow you to get down to business straight away.
There is a common misconception that domains expire on their expiration date. If a domain registration is not renewed by its expiration date, the domain simply goes into "expired" status, which means all services are shut off. Typically, we provide a 35-day grace period during which the current holder can still renew it for the standard renewal fee. For more information please review our domain deletion policy.
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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.
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