agreeden with those who've posted about freshdrop dot net - great place to look at all kinds of stats from multiple auction houses - you can see way beyond just PR there....
and -1 about buying names from DP users - you'll get digital herpes from dipping your wick in there
@kriminal - if you buy a name in the aftermarket, most of the time (if not always) you don't lose the history/age etc. There's a period of time when names are called "expired" or "expiring" but they're actually being held by the registrar before they get thrown back to the registry. As far as PR, only Big G really knows, but a lot of the linkjuice will stick as long as you get it before it goes back to the registry.
peace,
gregs.