Today I acquired a used Nikon AF Zoom Nikkor 20-35mm f/2.8 D IF lens in excellent condition, using the winnings I got from winning the #gumtreepeople contest (thanks @jonin60seconds, @nicolaj88 and @monsty). These lens were introduced in 1993 and subsequently discontinued in 2001. It has since been replaced the more expensive 17-35mm f/2.8 AF-S. Despite being years old it is still a pricey piece of kit. Grays of Westminster wants £745 for a mint condition second hand example! No doubt the introduction of full frame FX cameras has increased its second hand value.
The 20-35mm is compatible with all Nikon digital SLR, though it won't auto focus with older DSLR like the D40. The lens are friggin heavy (585g), and it should considering it is a pro-class lens with plenty of metal used as materials, always a good thing in my books. It is also large and is roughly the same size as my 18-105mm DX kit lens. The optics are made up of 14 elements in 11 groups. It takes 77mm filters and focuses at 0.5 metres. According to this site, Nikon made about 45k of these before discontinuing it in April 2001.
Haven't found much to complain about yet, but then again I haven't shot much with it (only had it for a couple of hours). Some minor distortions at 20mm, but nothing to get hung up about. Until I get a FX camera, the 20-35mm doesn't go as wide as I would like but it does make a good portrait lens for my D90.
Some resized (but otherwise untouched) samples: