Have low pockets...short stack pushes for $6 (25NL)

Ran into this tonight, and couldn't decide if I wanted to call or fold...

Party Poker $25NL, about 1am ET, .25/50 blinds

Just got to table, so I have no idea how desperate villain is. I have no PT stats on him.

Hero is in late position with 6[img]/images/graemlins/club.gif[/img]6[img]/images/graemlins/spade.gif[/img]

1 limper
Villain pushes all-in for his last $6
everyone else folds
Hero ???

There is still one more person to act after me.

What do you usually do here? Is this an easy call against a desperate short stack? 66 felt a little too low for me to call...but I think I'd instacall with 88+. The extra person to act made it a little tougher too.