Lost and Found

So, as I sit at the west desk the other day, a young man approaches me with a dollar bill in his hand. The conversation proceeded in this manner;

$Guy: Is this where the lost and found is?

709: This is it.

$Guy: (Holding out the dollar bill) So, this is where I'd turn this in, right?

709: Yeah, this is where you'd leave it.

Suddenly an aura of hesitation overcomes $guy and he retracts his small treasure ($1), clutching it tightly and asks me;

"Well, is this something that someone would come looking for?" (most likely dreaming of the pink-frosted mother cookie that he would purchase with the newly found fortune...)

I could tell this was a real moral dilemma for $Guy who must have had some high hopes for that dollar, and I said,

"Well, I can't make you turn it in..."

His head then drooped down while sadly looking at the dollar he was about to lose and said,
"Ok, I'll leave it here. But I'm going to come back in a few hours and if it's still here, I'm gonna take it"

I said ok and I put the dollar in the box. Whether or not $guy got to the dollar first, I don't know. But the real question is, if you had a brand new dollar bill, what would you do with it?