#2. "RE: Where to sell d40?" In response to Reply # 1
Which route you take also depends on how much experience you have buying and selling used equipment. If you don't have any eBay experience (feedback record, preferably good feedback from selling camera equipment, which I assume given your question you don't have), make sure you get a PayPal account and back it up with a credit card so that potential buyers can see that they're protected against scam. And, if you go the eBay route, first buy stuff (at least a dozen separate transactions) so that you get used to the rhythm of a sale, the etiquette of the community, etc. In addition, actually READ all the tutorials eBay provides to teach you how to buy, how to buy safely, how to sell, the rules and regulations of selling, tips for selling, tips for selling safely, etc. It might seem like a big investment of time (and it will be), but if you don't you will almost guarantee that you won't get nearly as much for your camera as you could; and on top of that, if you don't do your homework ahead of time, but you could get seriously burnt.
To help you decide, first join eBay. (It's free, and it's very easy to do.) Then run a search on "Nikon D40", and after you get your results click the box on the left-hand side that says "completed auctions." This will allow you to see how much comparable used D40s are going for on eBay these days. You'll notice an amazingly wide range of prices; assume that as an eBay newbie (assuming that's what you are) that you'll be able to get a price similar to what other eBay newbies are getting (look at their feedback rating to see how much eBay experience they've had, and click on their actual feedback to see what people have to say about them, and you'll be able to see just how newbie they are).
After you've done that, scroll through the Nikonians Want-to-Sell forum (you could use the "Search" function but I've found it to be temperamental), to see how much comparable D40s are going for on this forum. Then look up on Craig's List and do the same, and go to the KEH website to find out how to get an estimate from them (how much they'll pay for your equipment; it won't be how much they're going to sell it for!).
Then you'll know roughly how much you can get for your camera, and how much work you'll have to do to get it. So you'll be able to choose your route, based on how much time and energy it's going to cost you and how much you hope to get for your camera.
_________________________________ A little knowledge is a dangerous thing