prolly get em cheapest thru midwayUSA.
http://www.midwayusa.com/find?curren...erSearchQuery=
Above is a link to thier enitre Nikon lineup. I favor the Buckmaster models with side focus and BDC. I have two 4.5-14X40s and one 6-18X40. All 3 of which are top notch scopes for the money!