The rack foot and clips can be the expensive parts. If you're able to find a used system you'd still most likely have to buy those new. Have you considered converting a used jet ski trailer? Sometimes you can find one for less than $200, then you also don't have to lift a kayak onto your car's roof.
Most after market rack base system's are pretty muck the same, one brand may be a little less expensive or have less wind noise. I have a areo blade yakima system was $500 ish new. was supposed to be quieter than the Thule set up but it still has some noise.
Most after market rack base system's are pretty muck the same, one brand may be a little less expensive or have less wind noise. I have a areo blade yakima system was $500 ish new. was supposed to be quieter than the Thule set up but it still has some noise.