Amazon.com's Pricing

I received the first season of Babylon 5 on DVD as a Christmas present this past week. Eventually I'd like to acquire the remaining four seasons of the series. When I added all five seasons of Babylon 5 to my Amazon.com wish list, the price of each set was around twenty-five dollars. I was checking out my wish list a short while ago and I noticed that each season of Babylon 5 is now selling for almost fifty-four dollars! Perhaps they were on sale for a lower price for the holidays. If that is the case, I may have to wait until next Christmas to receive additional seasons of the Babylon 5 DVDs.