According to Backpack TF, the market price of crate #56 is worth 0.01 refined metal (1/5 of a normal weapon)
2 to 3 keys
Currently somewhere around 4 refined.
Team Fortress 2 is Free on Steam
Unusual hats in Team Fortress 2 worth a lot because they are unique and different, hence unusual. Not a lot of TF2 users would have them and that is what makes those hats stand out from the rest, and as a result, they are worth quite a lot.
In the trading community, The Sharp Dresser in Genuine quality is worth 5 keys. A normal Sharp Dresser is worth about 2 keys.
prices for purchasable taunts vary from person to person. but there is a general cost from the Mann Store.
In the trading community, a Strange Holiday Punch is worth about 2 to 3 keys.
alot
9
around 4GB
Normally it is $9.99 (MSRP)
They sell on etsy for $10 to $20