Bob, I don't know how long you have been collecting chips but I think it only fair to alert you to the fact that if these chips are obsolete, then the casino is probably closed and there is no way for you to redeem them. As a matter of fact, Ed's whole collection is probably worthless and I was just being a good samaritan by offering to unload his worthless collection for face value.

I could then submit my name to Time Magazine as the "Man of the Year" for doing a good deed.

Now that you know the facts, you might want to think about rescinding the offer.
Paul