i bought some real thumb-cuffs recently from Stephen's magic emphorium, and there was no instructions as to how to really escape from them...so i e-mailed and provided order proof to them and just asked...
they were great about it all, gave me e-mailed instructions on how to escape...very nice about it all...
i think there's a thin line for retailers of magic in some respects, but i've yet to have a bad experience with one thankfully...




and i even got a response from penguin magic when an order didnt appear after a week and no e-mail from then initially, then when i queried it all, lo and behold it appeared the next day...