How do you convert Dota 2 items into real money?

So, as the title says, I want to find a website where I could sell all of the items I win for real cash. To be more specific, I am looking for a website such as DMarket - https://dmarket.com/sell-dota2-items (the first platform I've found) with the best prices. And I don't care about its design or other useful features, I just need to get the most off each item and, of course, it must be secure.

I sell my dota2 items on trusted facebook groups back in 2015.

You can check vpgame too if there's a way to convert items to real money.

I have some stuff that I want to sell.

Please advise good web sites.