That is exactly it! Should run in the $3-$5 range and even used daily that bottle will last you atleast a month or two. You could have a huge cave man noggin like I do and still only need about a nickel sized glob for your entire head, neck, and possibly face.
I found mine in my local walmart in the area that has the lotion (gold bond, cocoa butter, Vaseline, so forth). It was on the bottom shelf and I too thought they didn't have any at first. If you are facing where the acne face washes and such are, turn around. It's probably behind you on a lower shelf.
On a side note.... It's sad that walmart is so corporate and so similar from store to store that I can tell you where to find a product in your local one without ever being there haha