Hey TBers, So a local music store has a used 6 Pro for 499. It is a Vietnam manufactured amp, looks like it came out of the box! Not a single scratch or fingerprint on it. Sounds amazing! Is this a fair deal, do these amps have any known reliability issues? Good or bad? I can only find one review on this amp. I ask because it seems strange that Ampeg would discontinue such a powerful amp with gobs of tone. The only negative I noticed was a noisy fan. But at loud volumes that wouldn't be an issue. Any owners of the Vietnam made 6 pro with info? Good or bad? Much appreciated! Did I mention this amp sounds sweet! I would hate to drop money on something that would cost just as much to repair. Thanks!