I have gotten several keys from Humble Bundle that are doubles of what I already own or planning to not use at all. I was wondering if anyone willing to do some type of trade? Like for a different game or for some artwork?

That or if someone knows a good way to trade unwanted keys, please let me know.

The list of games I currently have to do something are:
140
A Fistful of Gun
Alien: Isolation
Amnesia: A Machine For Pigs
Anomaly Korea
Apotheon
Areana: Cyber Evolution - Founder's Pack
ARK: Survival Evolved
Banished
Besiege
Bionic Dues
Bloodsports.TV
Brawlhalla - Founders Pack
Broken Age
Chaos Reborn
Company of Heroes 2
Company of Heroes™ 2: The British Forces
Company of Heroes 2 - The Western Front Armies: Oberkommando West (2 copies)
Contraption Maker (2 copies)
Dead State: Reanimated
DmC: Devil May Cry
Dropsy
Eldritch
Empire: Total War
Endless Space: Emperor Edition
Fallen Enchantress: Legendary Heroes
FarSky
Fenix Rage
Freedom Planet (2 copies)
Frozen Synapse Prime
GRAV
Grim Fandango Remastered
I am Bread
The Incredible Adventures of Van Helsing II
INK
The Last Federation
The Last Federation: Betrayed Hope
Lethal League
LOST PLANET 3
Lumino City
Mars: War Logs
The Masterplan
Mushroom 11
METAL SLUG 3
MirrorMoon EP
Neon Struct Deluxe Edition
Never Alone + Foxtales DLC
NiGHTS Into Dreams
The Novelist
OlliOlli
Outland - Special Edition
Outlast (2 copies)
Penarium
Pinball FX2 - Base game and Civil War Table
Pinball FX2 - Star Wars™ Pinball: Balance of the Force
Pixel Piracy
PLUG & PLAY
Reassembly
Risk of Rain
Robot Roller-Derby Disco Dodgeball
Saints Row IV
Screencheat
Shattered Planet
Skulls of the Shogun
Sonic & All-Stars Racing Transformed
Sonic Generations
Space Run
SpeedRunners
Spelunky
STRIDER
Super Splatters
Switchcars
Tales From Space: Mutant Blobs Attack
The Talos Principle
Titan Souls
Total War: ROME II - Caesar in Gaul (DLC)
Towerfall Ascension
Tower of Guns
Valkyria Chronicles
Viking: Battle for Asgard
Volume
Wasteland 2: Director's Cut - Classic Edition
Wildlife Park 3
Wrack (with soundtrack)
Yesterday