Another cool toy we found during our last trip at the flea market was Superman's Supermobile! Now why would Superman need a spaceship? I don't know! I used to own this as a kid but sadly lost it.
This was an actual vehicle used by Superman in the comics to clean up all the Kryptonite in the world, back in DC's pre-crisis days. Had a "Krypton-Action Ram" and "Villain Captivators". Apparently was made as a companion piece to Lex Luthor's Lex-Soar 7.
And here's an great article on what would have been the last series of Super Powers collection!