This is a great deal, still less than a dollar for your own unique identifier.Even if you can't get "your.name.com" you can surely get FE84CB3538274A0FA562CC85F955C392.com (sample used).
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7163650842
In addition to the low price, the zeros are free!
So not only do you get a guid, you get solid proof of the old adage "Nothing is free" and that is priceless.