There is one on ebay right now that is mislabed for a 850 tokheim. I thought that it was for a 505 but after looking closely it is for the 620. Just punch up Tokheim.
Ebay listing # 280960012155.
It's a difficult item to find. But this one is priced high at a starting bid of $369.99. Appears to be heavily pitted with rust with several perforated areas.
Taking into consideration rarity & condition; it's still overpriced in my opinion. Easy for me to say as I'm not looking for one.
Dave you are correct by all accounts. Just did the listing so someone that has asked before could either see it or negotiate with the seller.
Seller has a pump listed as a 152 BENNETT, IT AIN'T!
It's an AQUA, Model E-455 280956482740