I like the DVD price watch on find-dvd.co.uk which informs you when a DVD gets to the price you want to pay for it.  If this type of option was included in the 'Wish List' section and flagged when a DVD is available at your chosen price it would be excelent.  find-dvd.co.uk is just like many price comparison sites and I think they earn their revenue from referal to various DVD websites, so this option could also be a great money spinner for the developers of DVD profiler!