It must be hard to run a used camera store. You carry a lot of inventory that sells for a tiny fraction of its prices in the 1990s, even if it sells for a small increase over its price in say 2010. If you charge too much for a Nikon AF film slr, people will say you're price gouging, and if you charge too little, people will be insulted.
My guess as to why film [manual focus] SLRs are more attractive is that the people still using film, or who are converts or returnees to film, are in part rebelling against the high degree of automation and electronic-ness of digital cameras. So they are often more likely to want a fairly manual, mechanical SLR, than a battery-eating bulky, motorized, plastic clad film AF SLR. I like manual cameras, but an N90s is a great camera with great metering that now sells in the US for the about the price of processing two rolls of film.
As for the title question - the N8008s has better metering and faster AF than the N8008, so when the price difference is about the price of a large pizza, it makes sense to buy the N8008s. I imagine demand is lower for the N8008.