I am glad I am not this kind of collector. I just want to play the games, not worry about the labels and boxes. When the SD multi carts came out I bought one for every console and sold all cartridge games for a small fortune. I think Contra alone went for $50+.
SD2SNES, harmony cart, etc all work great. I just need a multicart for the atari 7800 to come out and then I can sell off all those.