I'll definately get rid of those cottered's...
back in the days I had an old norta tenspeed with cottered cranks which ripped several of my good jeans when I forgot to stuff em down my socks.

and yes I was talking about the dropouts, since they are quite important when looking for a frame I guess.

I'm getting myself familiar with the terms on Sheldon Brown's website.

I've seen some track wheels on an auction site for 50 Euro's
Are they always fitted with tubes?
I've got no experience whatsoever in using tubes.
On wikipedia I read track riders use tubes because when running flat, the air stays in the outer tube before escaping, thus running flat more slowly than tires. So they can get down the track lane before losing all air.
This is not that important for me, so I'm looking further for wheels with tires.