Nope.

https://steamhost.cn/help_steampowered_com/en/faqs/view/365F-4BEE-2AE2-7BDD

Next time don't use third party sites.

Originally posted by KleinerWurstzwerg:

I tried to sell my skins on a not offical way i already traded my skins to a middleman is there an option to get these skins back

Remember those checkmarks that you clicked to agree to the contents of the trade?

Do not trade for promises. If it can't go in the trade window, Steam cannot guarantee it.

Originally posted by KleinerWurstzwerg:

I tried to sell my skins on a not offical way i already traded my skins to a middleman is there an option to get these skins back

What trades should I avoid?

Do not trade for anything that cannot be added into the trade offer itself. The most common examples of these scenarios are the following:

• Trading items/gifts for money outside of the Steam Community market. You cannot add Wallet credit, PayPal, gift cards or any form of money into the trade offer.
  
• Trading items/gifts for CD Keys. You cannot add a CD Key into the trade offer. CD Keys that are offered can be for a different game, fake, used or region restricted.
  
• Trading items/gifts for nothing in return in the first trade and expecting to get an item or gift in a later trade. There is no reason to not trade everything in one trade. You may add unlimited items/gifts to a single trade. A common example of this is using a middleman to facilitate a one sided trade.

From: Steam Trading

You ticked a warning that said you understood the trade was a gift and you expect to get nothing in return. And you got nothing in return. You shouldn't be surprised.


There are exactly zero situations where a middleman is even necessary.