Panda aroma diffuser:  $18 @ Urban Planet (RSP:  $59.99)

I saw this go for 40% off right away, but that was still too expensive for me.  I ended up getting it for 70% off and that was just right.

I see them on aliexpress for $24, so this was just a bit cheaper.  Shipping was much faster too.

It works pretty well and looks adorable!  I've wanted a diffuser for a long time, but the other ones are boring and expensive.