You must have bought something from steam store more than 30 days ago otherwise the extra copies will be non tradable for a month.
Also, I need 2 keys for collateral. So you trade me 2 keys and 1 ToD ticket and once you open it, you trade me back 3 copies and I give you 2 keys, simple as that.
1 ToD ticket for opening 4 pack
You must have bought something from steam store more than 30 days ago otherwise the extra copies will be non tradable for a month.
Also, I need 2 keys for collateral. So you trade me 2 keys and 1 ToD ticket and once you open it, you trade me back 3 copies and I give you 2 keys, simple as that.