Congrats on the guitar move! Nothing beats the feeling of real strings over a mouse and keyboard. I actually did the same thing with my Dota arcana collection a while back. I spent a few hours researching and ended up using https://avan.market/ for the bulk of it. The UI is super clean, which I appreciate because some of these trading sites look like they were designed in 2005. They support Rust, CS2, and Dota 2, so you can liquidate everything in one go. I was surprised they offered direct card withdrawals because that’s usually hard to find. The price they offer is a bit lower than the Steam “suggested” price, but you have to remember Steam takes a 15% cut anyway and keeps the money on the platform. Here, you get the cash in the real world. Totally worth the trade-off for the convenience.