I have only one experience with a refurbed unit (6 disk Onkyo DVD/CD player from ecost) and it has performed flawlessly, with no visible defects. There is PROBABLY no more risk in buying a refurb than a new unit (maybe less), because whatever the problem was with it, it has been addressed and checked out.
B-stock is a different issue, I believe. To me "B-Stock" implies it may have some cosmetic defects, either because it was returned, or got banged a little in shipment or storage. However, it should be guaranteed to operate as though it were new.
Were it I, and I needed to save the money, I'd take the chance. The Denon 3805 is tempting, isn't it? Nice unit.
Some here have dealt with Dakmart (I haven't). Hopefully they'll comment on their experiences.
