Casio MG-880 - the famous space invaders calculator - on every kid's wishlist in the 1980s, and grown-ups' wishlists today.

Fully working, melody etc.

This is by far the most popular of Casio's game calculators and they're getting harder to find.

They are nearly impossible to fix and have usually had a hard life, so get a 100% working model while you still can.

This one is in good condition, has the usual signs of wear but isn't bent or worn, and doesn't have anyone's initials scrawled in it!

If does have a stain in the background (see photos) but doesn't affect functionality or game play - it's not on the LCD itself.