Yes, the top link. There are people into gold that have forums discussing this stuff as well. Ever since the price of gold skyrocketed people are melting down all kinds of CPUs they normally would not have bothered with. Pentium Pros are going to be very rare soon (for example).

I think you would get much for a Cyrix 586-120 (for example, 486 socket chip kind of rare) on ebay then for the gold content (if the pins havn't been damaged too much).