That sure is an aweful lot of money to risk on an 
item that the seller isn't sure of.  I'm not sure 
if I could trust their word for it myself.  It 
looks like a real drawing, but who knows if it 
was drawn by Toriyama.  It looks pretty high 
quality but from the scan you can't tell if it is 
a print or not.  It seems pretty detailed for a 
drawing that was used only to help the other 
animators.

On the other hand, if it is an original drawing 
of Chrono Trigger by Toriyama it is well worth 
the price ^^;