I have recently bought my D90 kit and had been tracking the BnS Nikon section to look for some used lens n equipment.
My personally feel that most of the postings are asking for kind of unrealistic prices for used items without warranty. A new Nikkor 50mm F1.8 cost around $195 and you can find many postings selling used copies at $170 without warranty.
Maybe I am wrong to expect lower prices, if so please educate me.
P.S. I understand the rationale that sellers do not force buyers to buy at their price but my point is that with so many 'high' priced used equipment, new sellers often are led to believe that the market is 'that' good.