Heads up to those who played CS:GO years ago and like money. I was a pretty active player from 2012 to 2014. Back then I got dozens of crates that I didn't open, now worth as high as 31$CAD each. I looked it up last week and it's worth over a thousand dollars in Steam. I cashed in on almost half of it and now I have some cash to buy games for my family and friends.
However, if I reflect on how much time I spent in the game in order to receive that much money it's laughable as it was easily 2 thousand hours of game play.
I have two tips:
Sell hardware and then you can get real cash. For example, use the Steam Wallet balance to buy Steam Deck Docks which you ship directly from Steam to your customer on eBay.
Secondly, use Steam Economy Enhancer.