Yes, but the market is still designed to make Valve money and they are using that as a marketing tool to entice you in. The more desirable skins are a lot more expensive than they would be in Fortnite or whatever. The upside is that you can sell and trade them, so you can actually recoup at least 85% of the value (or more), the downside being that the money stays in Valve’s ecosystem. Ignoring 3rd-party markets here, where you can risk selling for real money.