I assume you mean a CD key for a game. You realize that you can't sell games on the marketplace even if you have them in steam gift/inventory form?
As for your question, no, you can't.
Comment has been collapsed.
Maybe if you change the description of a marketable item it could work.
Comment has been collapsed.
01101110 01101111 00101100 00100000 01101111 01100110 00100000 01100011 01101111 01110101 01110010 01110011 01100101 00100000 01111001 01101111 01110101 00100000 01100011 01100001 01101110 00100111 01110100 00100000 01100100 01101111 00100000 01110100 01101000 01100001 01110100 00101110
Comment has been collapsed.
353 Comments - Last post 28 minutes ago by MXY
16,886 Comments - Last post 1 hour ago by Kenruyoh
1 Comments - Last post 4 hours ago by lostsoul67
2 Comments - Last post 7 hours ago by macgamer
2,688 Comments - Last post 9 hours ago by MeguminShiro
23 Comments - Last post 10 hours ago by snow0815
180 Comments - Last post 15 hours ago by opalss2
79 Comments - Last post 29 minutes ago by alliezzle
166 Comments - Last post 34 minutes ago by SmokyMonki
65 Comments - Last post 46 minutes ago by quijote3000
160 Comments - Last post 1 hour ago by Vierna
7 Comments - Last post 1 hour ago by Tcharr
15 Comments - Last post 1 hour ago by Tcharr
3 Comments - Last post 2 hours ago by Cactus123
just curious
Comment has been collapsed.