You can 1:1 cross non-marketable set trade with VanillaBot (Edit: Just saw, disabled for a month)
I think this would be the "perfect" group for trading with non-marketable items.
If you got duplicates you can use of course SteamTradeMatcher.
By the way.: I can give you 3 "North Side" cards (you have to trade one duplicate then for a complete set) to complete your set.
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with VanillaBot
p2p and without bots -.- Read first.
no bot middle-men.
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May I suggest that you try out the friendly folks at 1:1 Trading Steam Group.
http://steamcommunity.com/groups/honestmerchants
Members are usually helpful, check out the Card Trading, and Open Inventories sub forums.
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