Podzz.com is the latest incarnation of a fraudulent domain appraisal scam being run out of Canada. The basic pitch is that you receive an unsolicited offer for a domain name, with a list of three or more possible appraisal services to evaluate it. In this case, podzz.com is the cheapest, and the most likely for the victim to choose.
Of course, what then happens is that the offer disappears and the victim is out of pocket. We have covered this scam and the people behind it here, here and here. Avoid.