May I ask why? Since you have a lot of rep, I'd give you the keys first. These are unused keys from indie bundles I bought (where I already had the particular game before the indie bundle came out), and there would be absolutely no risk for you. You'll have the games in your library just as if you've bought the indie bundles yourself or if they would have been tradable. As you can see, I've done this a few times without ever any problems.
sure...well, i like to keep a certain amount of games in my inventory, so i can trade them. i see vessel as a pretty good game with some potential value. If i trade my tradable game for a key, i'd be losing a game to trade. i'm basically trying to trade vessel for a better game and work my self up to a really really good game. i also have a majority of those games. thanks for asking though
I want really good offers because I may keep it. tradable copy.