Old games? How old, exactly? X-x
Pretty sure this has been done before, but ehh...
Crimson Skies: High Road to Revenge for the Xbox 1.
Under $5.
Best flying game I know of.
Also, since the third game is FINALLY coming out ( still indecisive about getting The Third Birthday though, especially after the trailers :/ ), Parasite Eve is a hidden gem, mixing real-time combat with RPG elements, and a B-Movie plot. I found my copy a few years ago for ~15 bucks, so yeah. Too bad PE2 just plain sucked... they tried too hard to copycat the Resident Evil games, and just ended up failing at all kinds of levels >.<
Finally, Oddworld: Stranger's Wrath... I cannot stress enough just how badass Oddworld Inhabitants' last game was. The main character is badass, the crossbow weapon ( which fires living ammo - LIVING, BREATHING MUNITIONS, PEOPLE!! ) is awesome to the nth degree, and the story has a nice big twist that you might see coming from a mile away, but it's still crazy @___@