Here's the "Authorized Online Dealers" for Marantz.
http://us.marantz.com/us/Dealer/Pages/Authorized_OnlineDealers.aspx
Looks like Five Star Buy is not one, so a purchase from them would not have a manufacturers warranty.
Marantz PM8004
Thinking of maybe buying a Marantz PM8004, but since they are being replaced by the PM8005, can't seem to find very many out there on the web. I see some at Five Star Buy for appx. $800, but I'm leery of the site since I can't find out anything about it, unless some of you have some positive feedback about them. Anyone know of any deals out there from a reliable dealer?