Yes, it's mine; no they aren't like pictures from 3 to 4 different keyboards. It's the same keyboard, the pictures were just taken on two separate days. Once in natural light, the other time at night under my useless apartment spotlights.
The spotlight makes the shine look much worse than it is.
Having said that, you could just replace them with non-shiny caps.
DS keycaps in good condition are very common; G80-5000 + G80-3700, not so much...