Yeah, those are some of the coolest things on wheels, IMO. Made the pilgrimage to the local dealer when they came out, just to get an eyeful. Nobody else in the shop "got" it. Go figure.
And I'd be floored if the Ebay one went for anywhere near $1700. IIRC, they retailed for somewhere around 5-6 grand.
But yeah, too bad it's a 50. And too bad it's not street legal.
If I was king, Honda would make a bike like that in the 250-400 cc neigborhood. Fifty or sixty hp, maybe 300 pounds... yum.