I bought three Wii games last year and two of them were used: Metroid Prime Trilogy, Metal Slug Anthology and Skyward Sword. I bought way more NES and SNES games. I don't know if I will buy anymore Wii games in the future, maybe Pandora's Tower if that get released in NA.
I do, but I've been trying to buy more 3DS games, since I didn't have a DS I only have SM3DL and a couple downloaded games.