[quote name='htz']If I was buying a used limited edition on glyde, I would think the disc itself is used but the online code un-used. Otherwise it should be listed as the regular edition in used condition. The only difference seperating the limited from the regular is that online/DLC code.[/QUOTE]
The cover says Limited Edition. It's not the OP's fault the code is USED. That's what they're made for. Listing it as the regular edition would possibly open them up to someone claiming it's not the right game if the coverart is different.
If anything, they should attempt to make a notation in any seller's notes stating that the code from the LE is USED, but they should still list it under the LE's item number because that's what it was.