a forever stamp is how much
@anon39270, the stamps only hold the value that you originally purchased them for. i.e. The current price for a forever stamp is .44 cents (2010) so 20 years from now the value of that same stamp will still be .44 cents, even if the price for one ounce is $2 then. So, you would need five forever stamps from this year for 1 ounce in 20 years.