Hi Popeye,
I bought one NIB from Italy >10 years ago & paid approx. $550 (box had small tear size of quarter), but it was NEW never used & had all paperwork, foam, etc.. I liked it because it’s rare but actually was a pretty neat invention BITD. Unlike a playable which obviously is cool but just a paper weight.
I would pass at that price because it’s not CIB. Something that rare better to buy one time CIB if you want it CIB. If you don’t care about box, manual, warranty card, etc. then make an offer you think is fair for working loose one. But NIB/CIB mint I would expect someone to pay up to $750-ish imo.