Wouldnt touch it with a barge pole mate, i would put big money that this will drop like a stone in water next update. It looks to me like they have brought a dropped domain and stuck a blog on it (hence the no pr inner pages)
Around 200 pages indexed but now PR ?
Yahoo! Site Explorer
It is valid PR but can see it dropping with no real links good links to keep it PR6, i cant imagine that the content on the blog is PR6 worthy.
Id stay away mate for that price anyway, if it was a couple of hundred it might be worth a gamble. try and add a couple of PR 6 links etc but for 2 grand big risk, that kind of money can buy much better sites