OBL and Content quality are the important factors to check.
Got to be worth a try! I'm assuming it will be do-follow as well? Anyway, let us know results!!
If there aren't many links on the page, then go for it.
I did a bit of research with MS on a website that bought a PR5 link with about 100 links in the blog roll and seems to show up as a PR 5 anchor text link..