Two (2) sets of Thule XR Hull-A Port Kayak car racks. Purchased these racks last year. Maybe used 5 times. Purchased them from Mountain man Outfitters. They fitted them to my Thule rectangular/square bar. They come with locks, straps, and ratcheting tie downs. They flip down for transportation, up to fit one or two kayaks. Thule site "Thule Hull-A Port Kayak Racks is a versatile and lockable solution for transporting one or two kayaks. It folds flat when not in use."
Very easy to attach to bars.
There are 2 sets to carry 2 kayaks. They are are priced at $150.00 for each set. New would cost $229.00 plus key locks $49.00 and Straps $49.00. Don't know how much tie downs would cost. Will consider reasonable offer.