Would like to giveaway some steam keys

Hey there! I have aquired some steam keys from humble for games I already have.

What is the best way to go about giving them away here to (try to) make sure they go to people who actually want the game and not just code grabbers?

Maybe a giveaway thread with "tell me your best..." and pick randomly?

I have 6 pretty popular (but not new) AAA game keys, most with goty addins.