Yeah, I was wondering about the shiny spots on the keys too. And if it's been in storage since 1999, that means it got at most five years of use. Mine don't seem that shiny, except the space bars. I wonder if it's exceptionally bad/good lighting.
I notice one of the back rubber feet is missing, but at least all the adjustable ones are present.
One $550 bid suggests someone doesn't want to be outbid. I ain't touching it.