Why does Disney release its classics on DVD, make them available for purchase for a few weeks, then withdraw them? Seems to me that leaving them long term on the market would increase sales. I'm sure there are folks like me who failed to buy certain titles when they were on the shelf but who would now like to acquire some of those discs. Our options now are to spend big bucks buying from private individuals or to wait, hoping the titles will once more be released. I'm sure Disney has a reason for its policy. Could someone elaborate and explain it to me?