QUOTE(Mr.Beanster @ Dec 26 2011, 02:23 AM)
Coal in tf2 is 1 reclaimed metal. 1 reclaimed metal= $0.20-$0.25.
12 coals will get you a $2.50 game at most

Advice from me is to craft it.
Actually at start the coal is value at $1.20 per coal.
If ppl not abuse by multi account , each person max can have 13day x 6 objective = 78 coals (no game, no coupon)
Most ppl only able to do certain objective plus get the coupon and game from it so I assume each ppl got about 30 coals. 30coals x $1.20 =$36.00 (can trade for game that worth about that)
Got 1 guy at start state out that he is coal collector, he put $300.00 in steam wallet will trade any game for ppl with coal value of $1.20.
Someone trade 70 coal for his skyrim(that time still not appear in daily sales, skyrim quite valuable so can go to 70 coals) but after a few day, he start decide to drop the value as too many ppl trading the coal in, so he set it into $0.60 per coal.
I had done 21 objective, only got 18 coals, 4 coupon,0 game. Luckily able to trade 7 coal out for a game.
Anyone got game and want coal can PM me.