Nope, I would not buy a used receiver or a demo. The problem is Denon says there is a warranty but in reality you may never get it fixed. I sent my Denon 4500 in for repair 6 weeks ago and still have not heard anything from PANURGYOEM except they do not have parts.\n\nThats not much of a warranty.\n\nIf you want a deal get a new Denon 3600 for $799. That's less than the refurb price. This won't last.\n\nhttps:\/\/www.crutchfield.com\/S-lEGvJYwLtMG\/p_033AVX3600\/Denon-AVR-X3600H-2019-model.html\n\n\nThat's not encouraging.