a similar thing happened to me with a stack of drawings on 
mandarake.  the description on the auction led me to 
believe the genga/douga were originals and that there were 
SOME copies in the bundle.  i was willing to spend $$$ 
thinking i would only get a few copies.  alas, the entire 
stack of paper was copies - and boy did i feel stupid.

i just sucked it up not thinking i could return them for a 
refund.  luckily, it wasn't that much cash.  i just learned a 
lesson - make sure the item description doesn't mention 
the word copy.

lastly, what a wild bunch of freakazoids here.  i'm glad i 
don't frequent this joint... it gets pretty unruly!