Edit: the original comment left it unclear if the price rule only applies to copies sold that include a steam key, or if copies that work completely without steam can be arbitrarily priced. If the latter is the case, it’s obviously fine. If it includes any game version, it isn’t OK.
“You should use Steam Keys to sell your game on other stores in a similar way to how you sell your game on Steam.** It is important that you don’t give Steam customers a worse deal than Steam Key purchasers.”**
Just read that paragraph. It should be pretty clear what the whole thing is about.
Ok. The rule is, actually let me link it…
https://partner.steamgames.com/doc/features/keys
“Steam Key Rules and Guidelines”
“You should use Steam Keys to sell your game on other stores in a similar way to how you sell your game on Steam.** It is important that you don’t give Steam customers a worse deal than Steam Key purchasers.”**
Just read that paragraph. It should be pretty clear what the whole thing is about.