If you wish to sell CSGO skins you can do it at Steam Community Market, third-party marketplace of your choice, and at Skinwallet. Steam Community Market's biggest advantage is that it is practically impossible to get scammed. The prices are also quite high.
SkinsMonkey is the best place to trade skins.\n\n Not to mention all the extra trading instructions and full security guarantee. Out platform provides the best conditions for all CSGO players. Anyone who wants to make money from trading can do so by making successful trades.