What I need:

Taiga
Tundra
Tropical Island
Scrubland
Plateau

plus some other stuff on my want list

my trade list is full of some goodies and I've also got at least one of any of the best EDH cards in the format. If there's something special (that happens to be good in EDH) that's needed to make a big trade go down, I'd be willing to part with just about any of them.