EDIT: Just noticed you can't trade coal.
Yes you can...
http://store.steampowered.com/sub/715/All Half-Life games for $10. Including Half-Life and Half-Life Source, so you have the choice between the two and can play Afraid of Monsters & Cry of Fear easily.
EDIT: Just noticed you can't trade coal. Trading 33% valve, 25% stronghold 3, and HiB3 for offers.http://steamcommunity.com/id/rtberger
Selling Half Life 2 Episode 2 for Half Life 2.