Post-Raleigh Hercules: Can Anyone Help?

I received an email from Yanek of Bicyclog (which documents some of Tel Aviv's more interesting bicycles) asking if I knew anything about the Hercules brand. Apparently, Yanek has stumbled upon that dream of all old bicycle lovers: mint-condition old bikes in the back of someone's defunct shop.

I found an old bike shop here in Tel Aviv, (its not operating). I made an appointment with the owner of the shop, and at the back I've discovered these 4 black and one blue HERCULES 3 Speed bicycles the blacks are in mint condition directly from the factory, only the tires been eaten by the rats. and the blue is been slightly used. I wanted to ask you if you know how much this bike worth, and if you know something about this model or this brand.

I gave Yanek a partial answer, based on what little I know about Hercules, which is that they were bought by Raleigh in 1960, and that they manufactured their own 3-speed hubs before the buyout. These, however, have Sturmey-Archer hubs, so I'm guessing that they are 1960s or 1970s bikes. If you know anything more about these bikes, and can help Yanek determine dates and values, please leave a note in the comments.