Trailer with paperwork

I bought my trailer from a guy that did not have paperwork for the trailer making it a little difficult to sell. I just got the trailer registered so it is now legal. Again it is a 22' tandem. Brand new tires. Bearings have been removed, inspected, repacked with marine grade grease. I also installed brand new stainless steel bearing buddies. New submersible light kit. New keel roller. The tongue is in great shape. 2" ball. I will throw in a new receiver as well. Brakes do not work. I do not have pics. The trailer is in Brick. I am asking $1,600.00

What is wrong with the brakes?

Needs master cylinder and wheel cylinders.