I posted http://slickdeals.net/f/8773475-50-vizio-d50u-d1-4k-ultra-hd-smart-hdtv-200-dell-egiftcard-549-99-free-shipping?v=1&p=85280823#post85280823
this thread a bit ago, and if you go to accessories.dell.com and search for d50u-d1, the item comes up fine. However, once you paste a link to it within a slickdeals thread and refresh the page, slickdeals converts it to some sort of outgoing referral that breaks the link and shows the item as not available. If you paste the link manually or search on their site, it works fine. For example:
Copy & Paste of direct url:
Copy & Paste of url with http removed so you can copy and paste to verify:
Both of these are the same exact url, but the first one will stop working once it tries to go through slickdeals/mediaplex referrals.