Froogle and eBay are great places to gauge the value of collectables.
That bill goes for upwards of $130 in great condition...and about $20 for worn and folded.
I think tears would probably reduce it's value further...so I'll suppose yours is valued at $10-$20.
See others of varying conditions for sale here:
http://froogle.google.com/froogle?q=...&oi=froogle r