I've only seen $500 boxes of halves from my 3 supply banks. They all have told me halves must be ordered in $1000 increments. A $500 is a bit on the heavy side for many people and I believe if there are $1000 boxes they would be extremely unwieldy. A lot of tellers complain about the $500 ones. A $1000 bag is heavy but easier to manage than 2 boxes.