Hm. I must steal this and use it for my own characters, or even for The Town.

I wonder what El Jaspero will think of this thread... Of course, he's probably not going to say anything now that I've posted this. :P

I would bump the price up at least a little, though, so that you can't equip a bunch of 1st-level rogues with them and pickpocket your way to glory. Maybe make it cost 250-500 gp for that much of a bonus.
((Which is, of course, the point. I don't care.))