I would have thought that you could get a graded 85 one for that price and know that it's 100% the real deal (probably UKG though and not AFA). The prices have been going up and up for these recently after spending years around the 250 mark.
The last ones going through ebay are - UKG 85 - 500 GBP BIN, UKG 90 - 560 GBP both sold in Feb this year. Loose ones were 437 GBP, 396 GBP (no gun) and 775 GBP
all sold in January. I'm sure there have been others that I've missed and these are from UK ebay.
Just found this link to more recent sales -
http://www.ebay.co.uk/sch/i.html?_sop=10&_from=R40&_sacat=0&_nkw=vinyl+caped+jawa&LH_Complete=1&rt=nc
One last thing is that those pictures look kind of familiar to me so I would be careful to find out who the seller is (is it someone called Martin?).
Ian