A couple of years ago I walked into my nearest GC and found a used TC RH750 for $399 that was mislabeled as a RH450. I told the employee at the register that I wanted it but that I wanted to be honest by pointing out that someone made a mistake in labeling it. He said "no problem, it happens all the time' and took my money. Since it had just come in as a used item I had to wait almost a month to pick it up, during which time I seriously expected a call from them saying the manager had seen the mistake and wanted more money for it - but that never happened. That amp has been a real workhorse for me for 3 years now. The GC 45 day return policy has also worked out well for me with a couple of basses that I purchased that didn't cut it after using them on stage.