Venture Kid / Lizard 1 euro (Kinguin) / Hero-U: Rogue to Redemption for 4 euro.

Was just browsing and found it by accident, 2 more copies left on Venture kid, very nice if you are into retro. Don't think it was bundled before or anything, got a copy of all 3 myself, and keys worked fine, though first two redeemed as for beta testing (but there are games where those are just fine).

https://www.kinguin.net/category/49770/venture-kid-steam-cd-key/

https://store.steampowered.com/app/437690/Venture_Kid/
https://store.steampowered.com/app/400280/Lizard/ Sold out
https://store.steampowered.com/app/375440/HeroU_Rogue_to_Redemption/

https://isthereanydeal.com/search/?q=venture+kid