RAP,
It came with the boat, i didnt buy it. I had to buy a new door for it because the original had a broken plastic hinge. That was 60 bucks. It is very convenient. Its well built if all plastic means well built to you. :P
Knowing that it is 200 bucks, i dont know if i would buy one, but i havent seen anything else with the big drawer in it for any price.
Here is the closed pic:
