Would you like to own three (well, there’s some debate about the third, but at least two) great Thief titles before Square Enix ruins it with a reboot in which Garrett only has periodic control over his legs? Well! You’ve come to the right place, almost. The right place is GOG, but I’m here to tell you about it so that’s almost as good.
Thief, Thief 2 and Thief: Deadly Shadows (the maybe slightly less good one, but hey it still has The Cradle) are $4.00 USD apiece. You can pick up the original Deus Ex for the same price, and the sequel too, I guess. Anachronox is another is another tasty game on there; yours for $2.40 USD. A couple of the early Hitman titles are there too, also at $4.00 USD (no Blood Money though, sadly.)
Alternatively, if you want to have some sort of MST3K style bad gaming marathon you could grab Daikatana and Deathtrap Dungeon for $2.40 USD each. And if you need a confusing game starring David Bowie (who doesn’t,) Omikron: The Nomad Soul can be yours for $4.00 USD.
The deals run for another three days and nine hours according to the little timer (at the time of writing,) so you have a while to make your mind up.