So the 300 retails for $399? So used on ebay maybe it will be the same as a new Audiosource AD1002?For a Zone 2 application, the Audiosource AD1002 would be fine. But for use in a HT, I’d save up and go with a higher quality amp. There’s are several used Emotiva amps for sale on eBay. Some even have transferable warranties. Look for a BasX 150 (3 available), 300 and 500. The 300 would be perfect for your use. But it is more money. Those amp retail for $299, $399 and $499.
Edit: Bidding is not done on a lot of them, but it looks like they will all sell used for the same price as you said they retail new. I wonder if there are bots bidding up these things that seems weird.
What is "zone 2"? I need to use this for 7.x.4 atmos along with a x4500h denon receiver. Will the Audiosource AD1002 work for that, or does anyone know other budget options? I'm not spending $300+ for the two channel amp. The whole point of getting the x4500h instead of the x6500h (which I think amplifies two more channels) for like $700 more was to save money. Even after a $200 amp, that's $500 savings. But if I spend $400 or $500 on a two channel amp, I start to wonder if I made a mistake. Especially if Im buying the amp used. Maybe I could have just gotten the x6500h used.
Anyway, it's the sunk cost fallacy so it's probably a waste of time to think about. Bottom line, Im happy to buy used, but what would you recommend $300 max, ideally $175 - $250.