What the hell is PR

[Agent]

I've learned this much about PR: people will use it as weight when trading links and you'll see no traffic or increased search engine placement from it.

They make special offers like:
"Hey, I'll give you this shitty little link on my high PR buttfuck page and you give me (the world)..."

Beware of that bullshit. Seek out people who build no-bullshit, clean web sites with natural use of keywords. People who take their craft seriously. That was my big mistake, seeking trades on pages which have high PR and no traffic. And I can say they're not helping those domains in the SEs. I've since abandoned them.