I found it as part of a large package deal on ebay, the seller stated that he would be willing to split the package, I asked how much for this lens, he said 400, I offered 300 he said 350 was the bottom price so I took it....
my research showed that the 80-200 atx-pro sold new for around 800
tokina has another 80-200 that has a red ring rather than gold, from what I read the pro lens is definitely made better...
what camera do you have
Canon 20D