You can’t be serious that a simple personal opinion degrade the value of an equipment. You have eyes and ears, don’t you? You know what you need your equipments for. Nothing is stopping you from trying the equipment yourself before you buy it. The question is only how valuable is a certain equipment to you and your needs?
The possible degrading value of an equipment is due to several factors, like functionality, reliability, long term software support and serviceability.
And speaking of degrading value due to serviceability, here is one reason: