I just bought a PR3 domain that is in my niche I plan on 301 redirecting it to my money site. The domain was registered in 2001 and has no quality backlinks, additionally it looks as if it has been parked for a long time. What I don't understand is why the hell it has a PR3? I've check a few sources and it appears to be a legit PR3. Is it because of it's age?