What a coins (or any collectibles) set value is, and what price you can actually get when you sell it are often two very different things.
As a guideline, when i collected, most i would ever pay unless it was something really special, was 50% of vallue, often a good dea less.. So the paper value unfurtunatly won't make you rich
Gold and silver bars i think you can pick up at gold/silver price, right ?
Have been looking into those, and gold Krugerands myself just for the fun of it
Btw. any idea if there's a market for Visa Cash cards in US, got worth a small fortune of of those laying around *lol*