Neither I nor anybody else on Nikonians should advise you on specifically how much you should ask for your used gear. Its value is dictated entirely by the marketplace in which you're listing it for sale. About the best course of action is to note how much money other private, individual sellers are getting for the same gear and price your items accordingly. That's a guideline, not a rule.
eBay advice is even more useless than pricing advice. eBay is alternately rife with crooks and fair buyers & sellers and idiots and intelligent buyers and so on - a vast marketplace.
If you're asking for advice on how to get the most money, I'd say sell locally to avoid shipping costs, sell locally for cash to avoid PayPal fees, sell locally through Kijiji (if a local Kijiji listing is available where you live) to aboid listing fees typical of eBay. Sell locally to avoid potential problems that can occur with an international buyer who complains when your shipment to his country is flagged for customs fees, brokerage fees and local taxes. Sell locally to avoid the need for shipping insurance costs and the related possibility that shipping anything comes with a risk (albeit very low) that a shipment can be lost.