Online retailers keep tabs on what you leave in your cart and wish list. So if you don't purchase it right then and wait... they always jack up the prices. This is often the case. I bet if you drop it from your cart or wish list and go back in a few days or couple of weeks the price will probably be lower.
Interesting. Though that's not the case here. I just tried from a different computer and internet connection, that's never been on their website. Same increased prices.