I've figured out that there are only three stamps I need to keep on hand for PaperBackSwap, really:
$0.75 +
$0.84 =
$1.59, which is anything under 1 pound.
For additional pounds, I can add
$0.48, which is accurate for pretty much any book I'd be sending. (After a while, the prices increase less steeply.)
I guess I could do some sort of Internet-stamp
(
Read more... )