Well the 3DS has both Ocarina of Time and Majora's Mask on the system. Both good titles. It also has A Link Between Worlds, but that has a lot of fanservice from A Link To The Past which is available on the eShop, but it only runs on the New 3DS.
Ocarina of Time looks like a good bet, going wait more than likely on sale for Majora's Mask. (dont want spend too much on a game I dont know I'll like lol) .