How much should I sell my Nikon D7200 (w/18-140 lens) for?

Im thinking about selling my Nikon D7200 with an 18-140 kit lens included. I paid roughly $1800 for it, during a boxing day sale this year. I bought the camera in early December and I've used it a fair bit since then. I've taken very good care of the camera and it's in excellent condition. I thinking of selling it to help pay for my tuition this semester, so I'll need to be able to get a reasonable, but good price for it.

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Does this make any sense?

I've upgraded from dx to fx, including going from the Nikon D7100 to the D750, freaking awesome camera!

Anyway, the specs said that the 750 had nearly the same
Burst rate as the 7100, about 6.5 fps

Well, I'm getting Way more than that. I put it on continuous high, hold the shutter button and get off a good 12 shots in rapid machine gun succession before the camera slows down.

Same sandisk extreme sd card as well

I put the same sd card in the 7100 and nowhere near as good

So, what's the deal?

Nooooo, I'm not complaining, lol just the opposite, but I'm just wondering what else could explain this?

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What kind of camera/camcorder is best for birth videography?

I am already a photographer, but am considering getting into videography. I have a Nikon D90 that shoots video, but that's it since my d700 doesn't. Thinking about buying a HD camcorder or something of the sort. Any suggestions are appreciated!

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