As @pfunk said, women with facial hair are very rare; I think @themarkymark might have included them as an Easter egg, but I don't know the exact amount there are.

Another thing to look out for are how often two to three attributes occur together, because regardless of rarity, some of these punks are one of a kind, like this cro-magnon guy, I found the other day.

Or a better example due to desirability might be this king that @stealthtrader is selling for a million hive.

And sometimes this makes the Punks look like cartoon characters, like @pfunk's Grinch, which he is Auctioning Now.

Or my Ninja Turtle.