Maybe the markups depend on the popularity of the selection. Most of what I bought is not in high demand and I didn't notice any increase in price. For example, the "House of Eliott" series is currently $47.99 at amazon and with the discount is $31.20 at DDD. "Foyle's War" is $41.99 at amazon, $31.20 at DDD. Amazon has dropped the prices of these two since yesterday--I"m pretty sure HoE was $53 the last time I looked. If I don't like the price of a dvd, I just wait until it gets to the price I want .