Nikon 200mm f/2G Nikon 200mm f/2G AF-S ED VR II

Amazon is accepting pre-order for this, this swell piece of fine equipment.  According to Amazon, you are saving $1,200.05 from the MSRP of  $7,200.00.  Once you bought this monster of a lens, everything else seems so cheap, reasonable and easy.  In case you are a bit slow in the math department, that's $5,999.95 that Amazon is going to charge your credit card, and yes plus sales tax too.  (With the saving of $1,200.05, and an additional of $598.95, you can get the equally swell new Nikkor 35mm f1.4G lens, Wow)

The way I buy lens, is usually from some back alley in downtown Manhattan, from some dubious sellers on craigslist, in the tune of $100 to $200 top.

Note:  image from Amazon, for illustrative purpose.