What stuff is worth more than its weight in gold?

Item -- Price per pound
Gold -- $12,000
Platinum -- $20,679
Fifty Dollar Bills -- $22,680
Cocaine -- $22,680
Hundred Dollar Bills -- $45,359
Rhodium -- $77,292
Good-quality, one-carat diamonds -- $11.4 M
LSD -- $55 M
Antimatter -- $26 Quadrillion

(Via Marginal Revolution.)