I plead guilty for buying off of Craigslist _and glad I did this. I just purchased a Yamaha HTR-5940 for my main system. I paid $75. It's replacing my Onkyo TX-SR503. The surround and subwoofer channels were frequently failing to switch on. O.K. That problem fixed. But, the Yamaha's sound quality and set up flexibility is far better than what the Onkyo was. I guess I should have expected that since I have a Yamaha HTR-5830 on the office sound system. The Onkyo will serve in the basement sound system.