Stores
You'd be surprised where you can get a good kayak nowadays. Like these places:
Dick's and West Marine have good selections of kayaks, parts, and accessories. Walmart and Tractor Supply also have a kayak selection, in-season. I hate to say it, but sometimes you can find good deals at Amazon too. Many Walmarts also have live earthworms for fishing.
It's just a matter of time before they show up at your local supermarket. (Kayaks, not earthworms. Maybe earthworms too, if Bill Gates gets his way. Yum!)