Hi all - I'm on the hunt for a decent pair of bins which won't require me to commit a crime (against Nature or otherwise) to get - seeing two pairs of Monarch 8x42 on ebay but series # 6 and 6.3 respectively - can find no reference to the 6 models anywhere else on the entire internet - any thoughts? Is someone preying on my delicate bird-hunger sensibilities? Thanks! https://www.ebay.com/itm/Nikon-Mona...422467?hash=item265c3f7f43:g:PUEAAOSwOEZgTD6B