So, awhile back, I got an 8mm film projector for ~$10 at a thrift store. The bulb still works and the motor turns, but I haven't got any film with which to try it out. It's definitely regular 8mm, not Super8, which is admittedly not as good (I do love me some sound), but it's pretty cool nonetheless.

So, any thoughts on where I can get some 8mm films for cheap, to try projecting? I've never operated a film projector before, so I'd like to learn how to ... put the film in it properly? I figure I'll mess up and ruin some film, so I should start with something cheap and worthless. Advice?