Here's another site I'd forgotten about.
If you collect anything firearms related, check them out.
Advertising, ammo boxes, signs, etc., all kinds of good stuff.
The prices are at the top of the range but it's still worth looking at, even if it's just for fun.
They also have scientific and medical instruments (mwahaha), and bar/tavern collectibles.
Man cave stuff.
Oh, and I know I misspelled collectables in the header.