Recent Purchase: Megaphone
$16 including shipping from uxcell.com (a Hong Kong based import export company).
It's tiny, takes 6 AA batteries, and is a bit underpowered (but what did I expect for a 5W megaphone). The music feature is LOUD and annoying, which I figure it's designed to be.
Now if I only had a reason for actually owning it, I'd be all set.