What, did Max Hardcore do a quickie shoot with a tweaker and she forgot to grab her payoff?
Was it totally _dripping_ in bladder juice or merely _tainted_ by the random spillage?
Based on your scenario, I would not pick up a $20, especially if I had plenty of cash in my pocket. Only by mistake if I was drunk and did not notice the golden goo.
$100 is a fair sum.
But, uh, $20 ... I'll leave it for someone who needs it more. Charity begins at home.