Many of the rebates relate to very expensive lenses, and few are big enough to make you choose a lens you wouldn't have bought anyway. If you're teetering on the brink of buying something, now may be the time. The 18-200mm is $100 off, and the 35/1.8 DX $20 off, among others.
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http://www.dslrbodies.com/newsviews/february-2015-nikon-lens.html