So what's stopping stamp peddlers from buying up forever stamps at $0.46 before the price hike on Jan. 26, 2014, and selling them afterwards at a profit for less than $0.49?
We hashed out a hypothetical plan to see whether forever-stamp arbitrage is worth it. [...]
The good news is that you can buy up to 1 million stamps in a single order from the USPS, and pay a mere $1.75 in shipping. [...]
If you look at that as a profit on the $4.6 million initial outlay, it's not very much: less than 1.3%. But remember, all that outlay was leveraged. So if you look at it as a return on our investment -- $33.25 for shipping -- it's 175,541%.
Phase Three: Profit