What’s the smallest unit of currency you’d pick up from an undesirable location?

Yesterday, in the men’s room at my office, I noticed a penny on the floor directly under one of the urinals. I should note that, for some reason best left unexplained, there’s always a small puddle of something on the floor under the urinals. (Apparently someone has chronic bad aim.)

There was no chance in hell I was going to pick that penny up! But it got me thinking, what is the smallest unit of currency I would pick up from that location, assuming it required me to touch it with my bare hands? I pondered for a minute and decided with confidence that a five dollar bill would be the minimum value for which I would subject myself to the sub-urinal horrors.

What about you?