Does anyone even want/sell items from steam games?

I have a lot of heads from Battleblock too and tried to sell some weeks ago, but without sucess. So, I guess no one buy this 'cause is easy to get in game

Dota 2 has a good market I guess, but not sure about another smaller games since I never seen on the market

(sorry some English mistake 'cause isnt my first language)

Not worth anything but they're sometimes used to move Steam wallet funds from an account to another.
For example you're buying $1 worth of bundle games from someone, they put a Battleblock item for $1.15 (since Valve & the devs get a cut) and you buy it.

Since payday 2 has marketable items I made a decision that I'll not buy a single dlc before previous ones pay back in items and I'm in 1/3 of completing it :)

I got all BBT heads consider steam.tools/itemvalue/ worth 13,17$ (or 6.29 after fees applied) I would be happy to trade it for 2 tf keys))

also I got drop from armello in December, sold it for 7$ or so on the market, so I guess it is a thing but on the small scale

Have 3 pretty rare items at market for selling them...2 of them sold really quickly but the 3rd one with the highest price still waiting, think a month passed so yeah pretty sure all other markets except tf2/ csgo are dead.