Ever have that problem of finding yourself credit card in hand ready to purchase that perfect, must have, “it” product, only to find out that it’s currently not in stock? Or maybe you’ve had your eye on something a little indulgent and probably not very practical to purchase, but you want it anyways? With BuyItLater, you don’t have to suffer for long. BuyItLater is a new Firefox / flock extension that’ll add a “Buy This Later” button to Amazon.com webpages. When a product you want is in stock, or on sale, BuyItLater will send you an email or tweet letting you know. BuyItLater is easy to use. Just download the extension, enter an email address, and start shopping. You can add or remove listings and view the stats of your watch-list whenever you want. It’s free and a product of Canada.