We've seen and have been contacted by a number of people selling links on high PR sites. Links on homepages cost at least 5x more than inside pages even though there may be only a 1 PR difference. If you're buying these links, what strategy works best for you?
First of all don't buy links based upon Page Rank.
If I wanted to, I could sell you a dozen or so pr8 links on the spot, but their value is very low and it would not do you much good if any.
Evaluating good links is a science in itself, today you need to do alot of homework to determine what a link is worth. It is a "buyer beware" market and many people miss this and are just throwing their money away.