Originally Posted by prospect60
YMMV of course, but many people have had success trading in HDDVD (particularly the Combo's)
I've heard it's YMMV as well, but I traded in 4 HD DVDs (2 Combos, 2 Regular) just yesterday and they were taken with absolutely no problem.
The nice clerk even chatted with me about them for a second.
She said... "Oooh, you're trading in some of those HD movies! I guess you can't really find players for these anymore."
I lamented how I thought the red cases were prettier while she rang-up the trade in. As I was trading an HD DVD copy of 300, she offered some advice by telling me about the 300/Troy/Alexander Blu-ray triple feature release they had.