I too have posted before asking for DVDs of all the seasons.
I'm guessing the problem is sharing royalties with the previous
hosts. I don't know why we can't get an answer from TOH or
Time Warner as to why we can't buy previous seasons.

Come on, guys. WHY CAN'T WE BUY DVDs OF ALL THE PREVIOUS
SEASONS? You've got some of the most loyal viewers of any
show on TV, so get us an answer (or better yet, the DVDs).