As said above definitely photos of every side of the gear and in inside nothing is more reassuring than being to see inside a high quality piece of equipment. A ballpark MSRP is also helpful. Also making the technology clear is important, I want to know if an amp is Class A, AB or D, this is surprisingly hard to suss out on some sites. Also if it's tubed gear what tubes does it use?
Marketing speak, hype, and technobabble are not.