You're mostly right, hard usage may lead to fast degradation, but unfortunately it is hard to tell how a device has been used as long as there are no obvious si

You're mostly right, hard usage may lead to fast degradation, but unfortunately it is hard to tell how a device has been used as long as there are no obvious signs. Especially when there was more than one owner. It's a bit like buying a used car - if you are not an expert, it's risky, but avoiding obvious red flags 70% of the time you're not getting ripped of and you save a lot of money.