That sounds right about the staples although I was told that it was the shop owners that did it ( I'm sure someone else will have more info).
As for price, this one is listed at the moment http://www.ebay.com/itm/Vintage-1983-Star-Wars-Darth-Vader-MOC-ROTJ-Top-Toys-Rare-Argentina-Variant-/121049983130?pt=US_Action_Figures&hash=item1c2f24289a
Or you can make your own (once you've found the correct figure), for this - http://www.ebay.com/itm/vintage-TOP-TOYS-Star-Wars-DARTH-VADER-backing-card-w-bubble-foreign-Argentina-/261162258216?pt=US_Action_Figures&hash=item3cce7bcf28