The ~4″ figure comes with two heads, one with his standard bored expression and the other with the stereotypical intense anime face. It also has three pairs of arms: one folded, one for holding his grocery bag accessory and one with his fist raised. Be very careful about handling that last one. Finally, he also comes with two capes. If you pre-order it straight from Good Smile, you’ll also get a Vaccine Man acrylic plate for free. I bet Genos is depressed that he’s not the freebie.
You can pre-order the Saitama Nendoroid from Good Smile for ~$35 (USD). Be sure to hide your super villain toys before he arrives.