I'm looking for a fun inexpensive game to buy

Hyper Light Drifter by Heart Machine is a work of art imo if you're into pixel-art RPG's. Tight combat/movement and very mysterious but moving story! You can grab that for $25 on Steam I think.
Domina's a fun gladiator management game where you both play as a the ruler and the individual gladiators in a cool pixel-art graphics style. That ones pretty cheap too.

Honestly worst comes to worst if you're just trying to find a cheap game to enjoy check out websites like G2A or Kinguin and buy some super cheap Steam codes there. Cheers