If you are looking to buy PR, why not consider this bridge I have for sale in brooklyn? This bridge is fantastic. By owning this bridge, your google rankings go through the roof, your conversions skyrocket, and all the hot internet chicks come over to your house to write your code for you and do your laundry.
It's an awesome awesome bridge I would be willing to sell for $50 a month. In fact, I might just ebay this bridge. No wait, I'll keep the bridge myself and spraypaint a ton of URLs on it... wait that's a good idea. Now that I think of it, it would probably do more for my traffic anyways. That's it, I am hoarding my bridge in brooklyn for my traffic before google figures out what I am up to.