This is an excellent and versitile lens. Can be found both on eek bay and KEH in the various different iterations for about $300. In the autofocus catagory there are at least two different versions I know of; a pre-digital one and one with "digital" lens coatings. I've got the older one and can't see any difference myself but maybe others can.
I like it for it's short tele capabilities and it's portrait capabilities as much as I like it for it's macro.
A few samples
NaCl(if it's not on the camera, it's in my bag or in my pocket)H2O