If my services can be sold for a reasonable price and I get paid an exorbitant amount, I'm over paid. If my services are sold for a ridiculous amount and I get paid a reasonable portion of those earnings, I'm overvalued but not overpaid.

If you want to look at it another way. Why are people paying $1 billion for a super bowl commercial spot? Because they think it will give them visibility worth that amount. But the real question is why are viewers paying that much consideration to a super bowl ad? They are overvalued.