I have been reading reviews on the denon xx12 and xx13 receivers and there have been some reliability issues with them. For example, amazon reviews of the 1612 and 1613 have revealed issues with the receiver overheating and switching off randomly. One Amazon reviewer of the Denon 1912 said that the receiver caught fire. I might consider accessories4less for a higher end receiver but I would be very skeptical about buying an entry level refurb from them from any brand. With any refurb you buy, there was already something wrong with it and there is no guarantee that the same or more problems won't pop up in the future. I would agree that it is a risk buying a used receiver from ebay with no warranty but I can look at things like seller feedback and if they have a return policy. For example, if the return policy was 14 days, I would think you would be able to discover if something was wrong with the receiver in that time.