This one claims not to be shipping for a couple of weeks, but stocking stuffer or not, it’s hard to beat $5 for an optical wireless mouse. I’m tempted to pick one up just to have a spare. (Or to have a mouse that travels with my laptop, so I can leave my regular one at home on my desk.)
Somewhat related: I could tell you how many order I’ve placed at Amazon in the past week, but then I’d have to kill you. Sorry.