How much are 1992 Elvis Presley stamps worth?

Scott Number 2721

Can be purchased for $1.50 mint and .20 used.

Dealers seldom buy single stamps. Sheets of mint stamps are purchased at 80% of face value and often used for postage, a 20% profit. Given the collect ability of the stamp subject, I would guess that you could sell the stamps in quantity for a little above face value.