dude, little advice, before gave offer like this, check game prices on market.... there is full offers for 4-5 keys and moreover this game cost 10$/E on sale... so none one here will buy it from you in this price... have free bump ;)
It's selling full price at $50 and games aren't marketable, so I'm not sure what you're talking about.
Lol people can buy games as gift, place it in their inventory and trade it later. It's even worse if you're selling a key since TR was also a free game with some graphics card so there's already lots of resellers, not to mention it's been on sale for around 10 bucks at places like amazon or gmg. You might want to reconsider your expectations.
I never said it was a key. I have it as a gift. Nonetheless, it's $50 on Steam right now and if I'm not mistaken, this is Steamtrades.com, so I don't really care how much it goes somewhere else, if you're not interested, don't bother with a reply.
Edit: And when I say keys, I feel it should be obvious that I don't mean 15 GAME keys, if you play CSGO, you'd obviously know I'm referring to CASE keys, so unless you have those, don't worry about commenting here.
I'll also accept less keys if you throw in a nice knife too.