Originally Posted by
meiguoyungwai
For shipping credits, does anyone knows what else counts online besides stamps on usps.com? A sheet of forever stamps at USPS is $11 + shipping. Looking to fill the difference
The JFK stamps are a sheet of 12 for $6.60.
You can also buy other random values of stamps including extra ounces, $1, etc., some of which have pretty small minimums. There are also prepaid Priority Mail envelopes -- $7.75 each, but minimum 3 (but at $23.25, not a bad use of the $20 credit). I might buy those rather than stamps going forward, because I rarely use stamps, and I often find myself mailing things by Priority Mail. You can also buy individual stamped envelopes.
I also have a hunch that you could buy whatever you want on there, but maybe someone else wants to be the guinea pig to find out.