Yeah that's fake domain stats. After they pull the 301's, it'll be more worthless than it is right now.
You'll want to see 20+ page\domain authority. Like I said above, I'm finding plenty of good pr 2-3 expired domains that fall into this authority range.
PR5 is going to cost you quite a bit more understandably. I even see people trying to outbid each other for fake PR domains, just because they get greedy and don't look at all the details, so definitely check out the page\domain authority before even looking into the back links.
As alternatesword mentioned, PR hasn't been updated in many many months, so even if it's listed as a legit PR5, you'll want to see the backlink trend to see how much it's dropped, as when PR is updated, it may not even be a PR5 domain any longer.