I don't wanna say it's rules, but this would help all of us TSers.
I completely understand that we are poor...or in the process of being poor. So, there will be a $15 purchasing limit to your Santees. If you could only do less, that's cool. If you could do more, that is equally cool.
Imagination! If you do not want to purchase a gift, you could craft something instead! I never want to stop anyone's crazy-awesome ideas.
Unless you KNOW that your Santee would laugh/dig it, please have the gift be of taste and appropriateness.
Other than that, let your imagination and ideas from the wish-lists soar!