www.thebloghoster.com
Is PR4 (PR5 until last update), but I havnt touched it in many months.
Has many PR3s and I have found 3 PR4s - maybe more.
Comes with $300 script - best blog host script there is.
Shit Alexa rank and I havnt seriously tried to monitize it.
7480 backlinks on Yahoo - 7430 pages indexed on Google.
Not really in your desired specs, but bargain basement price - anything within reason......