and give them 100% of the money, i don't want to let steam take their 30%

nope
the 30% cut is the price publishers and developers pay to have their game on steam

and what game you talking about anyway ?

if its cyberpunk 2077 you buy it here all proceeds go to cdpr

If you buy a game from a Steam key seller, you won't give any money to Valve. If the developer/publisher have their own store selling Steam keys, they can potentially take 100% of your money. Otherwise, the other store will take the cut, instead of Valve.

Now, if the game in question is Cyberpunk 2077, then the Steam version is only available on Steam.

its was CB77

thx for takingg your time to answer :)

Although the key seller will have had to get their keys from somewhere, which would usually mean that someone, somewhere has given Steam some money for that.

Yes, they get them from the developer/publisher, who in turn gets them for free from Steam.