I paid 125 to replace a control arm, and I supplied the control arm. In my case though, the bolt that goes through the rear of the control arm was seized, and needed to be cut and drilled out. (I did one side myself, and was happy to pay 125$ not to have to do the other side.) I would say that 200$ to replace the control arm to include the part would be pretty reasonable. Replacing the flex tube for 775$ sounds pretty high in my opinion.