+1 ... I keep all my camera gear in MINT condition, including original boxes, manuals, CDs etc ... in the last 6 months I made over 70000 photos (not counting tons of video footage) ... only absolute ignorant people think that if your gear is in mint condition than you are not using your camera much ... good house keeping of your camera gear is not a sign of a poor photographer ... by the same token, just because one's camera is full of dings or scratches does not mean he/she is a good photographer.I feel sorry for Nikon owners.
It doesn't matter what model they buy, even when first released, as a few months down the track, Nikon will bring out a new and improved version of it making your current model obsolete and now worth substantially less than it cost you. Remember the D600 then the 610?
Canon does hang onto models much longer, and hence they have better re-sale value later on as say, after 3 years, your Canon may be just superseded, but if you had an equivalent Nikon, it would be 3 models old and practically worthless.
I'm not saying that Nikon cameras are no good, in fact, they are very good indeed, but constant model updates is not how you keep up the perceived and resale value of products.
It also makes it more difficult regarding spare parts too, as many models mean lots of parts and distributors only have so much space and money for parts.
I feel sorry for people who buy cameras based on how much they can sell them for.
If your camera is in good enough condition to be sold as "mint" or "near mint" condition then you obviously haven't used it very much.
I'm one those guys. I like to keep my camera bodies and lenses nice and clean at all time.
Just sold one of my 5D III on CL for $2600 cash. Buyer seems to be very happy with the cosmetic condition - MINT.