Can be traded, not put in the market. Special times like these 3d ones should have this. It would be cool.

And that would achieve what exactly? If people can transfer them then they can be sold just as easily as them being in the market. :/

It'd have to be all or nothing for both otherwise it's utterly pointless.

I think what he's getting at is it would he harder for people to sell these "special" items and therefore people wouldn't be so inclined to sell them which would drive the price up because the ratio between positive TC flow and effort required to sell is pathetically large.

Yes. Things that are only achieved and tradable at the owners will. No torishop market for it.