I’d pay for shipping if you dropped them off at a UPS store or similar. Were they off an OT or a standard edition GX550. I know the rails are different and not sure if the cross bars are the same for each style?
It’s too bad the new GX’s come in loaded with stuff you don’t necessarily want and it’s take it or leave it from the dealers.
It seems the roof rack is one of those items. I’m hoping to find one for $500, would that work for you?