Exploding winter gifts from 2005

I have a bunch of Grenth's Winter Gifts from 2005. These look like the normal Winter Gifts but they don't stack with them, and when you double click on one, it makes a green explosion around you. People are usually very surprised when I use one. Are these worth anything now? 2005 is the only time you could get them so they have to be extremely rare, but the problem is that they look just like the normal gifts.

Bump
Bump
Bump

can't really put a price on it unless u go actually post it in high end or low end.