Troubleshooting method: eeny, meeny, miney, moe!

These guys just replace things one by one, charging you as they go, until they get it right--or not! $784.87 (replace struts) didn't fix the problem I specifically brought it in for, "a vibration at 60mph," so I brought it back a month later after being promised on the phone, "We'll make it right for you." This time I was charged another $103.98 (replace tie rod) only to drive away with a car that still vibrated (I even took the Asst. Mgr. for a ride so we could share the experience together.) So they refund me the $103.98, they say I need a new steering rack, and they'll do it at the discounted price of another $500. It didn't make sense to me that a steering rack could cause vibration, and when the manager sensed that I wasn't going to play this game anymore he became mean and told me to go somewhere else. So I went somewhere else--Google--where I learned that vibration can be caused by bad brake rotors. I spent $71.26 at a parts store for two new rotors and after a couple hours under the car I was driving around at 60mph with no vibration! It cost me $784.87--and if I hadn't smartened up in time over $1284.87 (because the new steering rack wouldn't have fixed it either)--to learn "Ithaca Midas is a money pit!"