@0:09 -- why not to use track ends?

What's the going rate for a Krypto Evo mini around these parts / does anyone know of a good deal? I've been finding that I tend not to go places where I need to lock up (which works for not getting my bike stolen, but is annoying) since I'm not confident in my cheap/low end black "Kryptonite Keeper". Oh, and I would like something light enough that I could toss it in my bag without thinking about weight.

EDIT: I just measured and the tire clearance on my conversion is probably too big to lock wheel+frame with a mini ulock. Any alternate suggestions? Locking frame only / cable for wheels, or locking the rear wheel "sheldon style"?