After the rise in rare (covert) skins, I decided to try my luck. I sold everything, albeit at a not very good price, and collected little over €300. I probably got lucky with the trade-up contract I made, but I'm still a little confused. Should I keep the skin or sell it now? I was also unaware until now and noticed that there is a fade percentage. Could you provide a little more information about this? I'm not sure how to check the percentage for myself.