These would make wonderful ex gifts:
Unique holiday gifts!
In case the link isn't working it says: half a lava lamp and a broken computer hahahhaa.
No you should not get your ex a christmas present - no matter what - it won't be appreciated. So all of you out there who think you can win your ex back with some awesome concert tickets, expensive jewelry, or whatever are mistaken - leave them alone - go buy yourself something nice instead :)