Master system 2 wasnt very good, whomever got that one was severly ripped off, unless you got a model 1 and you can actally play all the 3d games, missile defence 3d was a great game for its time. The 3d glasses in general was great, plus the my hero game card.
Good luck finding the model 1 with the light phaser and 3d goggles. Its very very hard to find that complete. You are lucky enough if you find the 3d goggles. The 3d goggles go for 100+ complete alone since they did sell that seperately at one point.
And out run 3d is one of the holy grails of SMS. Very hard to find that one and some TEC TOY games from Brazil.
If you find those, you don't pay too much for em since they can be VERY costly to a collector.