If you buy keyword specific domains, you're really buying the type in traffic.  I use the URL builder and redirect through that URL so you can see how much traffic your getting from the keyword domain.  There seems to be no rythme or reason to what keyword domains deliver traffic and what don't.  By tracking traffic with the Google URL builder you get a feel for what names are giving you traffic and which are not. ie. the plural, the singular, two words, three words, the possessive, etc.
Surely if you purchase a domain (domain1.com) and redirect it to your existing domain (domain2.com) you expect to loose all ranking for domain1.com. If 301's are used then the objective is simply to pass on authority, not dominate the search results with 2 domains. If you want to keep domain2.com in the index then you would take Rebecca's option 2 or 3.
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.
When searching from keyword DHG will take your list of keywords and search each one, the pages will then be crawled to find unique domains to check availability of. The process is relatively simple but very time consuming when done manually or semi automated as was necessary in the past. Luckily now the job can be set and left to work while you do something else.
Expired Domain Finder is a software tool that allows users to find powerful expired domains to turbo charge your search engine rankings. For those of you who don't know expired domains are simply domains that were registered but are now expired as they have not been renewed by the owner. This can happen for many reasons, the person has lost interest in the project, the company has gone bust, the company has rebranded and many more reasons. So what would one use these domains for? Their backlink profile, its no secret the more backlinks a website has the higher it appears in Google. Once you find an expired domain with a strong backlink profile you then have two choices. Firstly you can use it as a money website, by money website we mean a website that you will use to generate a profit from, this will be your main website. Or you can use it to build a prive blog network. A private blog network is simply a network of websites that you own that all link to your main websites (your money website) with the intention of making it rank higher by linking to it.
Thank you for a very informative article. I am still a bit confused on a couple of things. There is a domain that I have been looking to purchase for about a year now and it expires within the next 24 hours. It is with name.com and appears for backorder at snapnames but not at namejet. I am assuming this is because they are both connected auction houses?
What I like to do is sort by DP which stands for domain pop, and this is basically the number of linking root domains. So, BL is the number of back links. As you know that can be somewhat misleading if they have a lot of site wide links or multiple links from the same domain. I like to sort by domain pop. What that does is it brings up the sites with the most amount of referring domains.
The easiest and least time consuming option is to 301 redirect the old domain to your existing site. This tactic obviously works best if both sites are in the same sector and are targeting the same keywords; otherwise, if you have a pet supply site and you buy an old Texas Hold 'Em poker site, a redirect probably might raise some eyebrows among the search engines. If, however, your site is brandnamepets.com and you buy onlinepetsupply.com and 301 redirect the domain over, you're inheriting a lot of topical and appropriate links.

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!

Thanks, Michael. I cannot find the auction site house of this registrar. It IS up for auction, but it’s NOT fully expired nor dropped – so it appears as though using an automated domain name backorder service may not be the best course of action. The URL still renews every year and is not set to expire until June 2016. The registrar is DOMREG LTD and seems to be tied in to LIBRIS.com. Any suggestions? I just need to ensure my $ is going to the actual entity that’ll grant me the URL. I’m unclear how to avoid paying $ for the URL to a company/service that can’t actually do anything for me (i.e., getting ripped off). Thanks for any direction you can offer.
Page authority ranking criteria are similar to domain authority. It’s ranked on a scale of 1 to 100. Page Authority measures the predictive ranking of a web page. The page authority of a website can change depending on various metrics. Search engines examine the relevance and authority of a page based on its contents and external links. If a webpage has links to higher authority sites and has keywords in it, its authority ranking will increase.

The following TLDs are now fully supported with a deleted list and a droplist (pending delete list). .hn, .ht, .rw, .cr, .gl, .gy, .gs, .om, .qa, .ir, .pe, .com.pe, .tc, .ky, .th, .co.th, .ke, .co.ke, .uz, .kz, .pm, .re, .tf, .wf, .yt, .sx, .gd, .gi, .kg, .mu, .im, .ug, .sb, .tl, .st, .sm, .so, .sn, .pf, .nyc, .cloud, link, .ms, .mk, .af, .bi, .pr, .com.pr, .nf, .nc, .dm, .bo, .ki, .iq, .bj, .am, .as, .ax, .fo, .mg
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