i don't know if the have them where you live, but half price books buys DVDs and CDs as well as books.
i have the first two seasons of heroes and the second season of how i met your mother. i really want to get the third season of himym, that season was golden.
my favorite show of all time would have to be frasier, with third rock from the sun as a really close second. community is rising up to the top, though.