Design for Different Pricing

In the Objectified documentary a designer mentioned how people would unfairly price better designs at a higher price, when it should be the opposite. However another designer mentioned that "better" or "good" designs are sometimes cheaper while others that are not "better" or "good" are priced much higher. (I agree with this as well, having been down Rodeo drive or in high end fashion bag stores where I don't understand how some designs of clothing or accessories survive in the market.) I always hate it how the functionality of the design is the exact same but the colors or aesthetic look is different and are priced differently just because of that (ie. black vs. white macbook). I was in a Sanrio store today and picked up two tote bags. One of them was a light blue Hello Kitty tote with daisies that was attached to the original price of $6.50. Another was an equally adorable (perhaps even more in my taste) red tote of Hello Kitty with apples that was priced at $5.95. I was so confused why the red tote was less expensive. It was the exact same material and size, with even more print material on it and almost, in my opinion, a better looking tote. I don't get it... maybe the design of the Hello Kitty with the apples is less popular or more (I've definitely seen more of that design), but it would be great if I could find out how that particular pricing decision really came about.