yeah it was just the fact that he/or she was selling a NES manual. Stating that it went with a SNES game.
I usually see this sorta thing happen with comic books. Someone would list Detective books with Batman books. Unaware that there are multiple Batman comic series, with each having their own numberings.
I thought he might get a bid as that's probably not a bad deal. Batman Returns usually sells for around $10 and I dont know what a nes Batman manual sells for. My guess would probably be around $5.