No. https://www.google.com/search?q=d7100 finds the body for about 150 bucks more so you're getting used, no warranty and if there is is any issue you would be out the 800 and burned.
But hey, your choice. For me I don't go used unless it's really big savings. Say more than 50%.
Bob
Am thinking of buying a used nikon d7100 with 29k count (body only) with a thirt party battery grip and nikon wireless mobile adapter for US$800 in great cosmetic conditions. and is just one year old.
Is this a good deal? does the shutter counts gonna mattered if i decide to sell it in the future? cuz is gonna be like 40k ish for a less then 2-3 years old camara.
Chowhound
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