mass airflow sensor install

All I can say is what a rip off. They charged me an outrageous diagnostic fee, which they didn't deduct since I also had the repair done as well, then they waaaay over charged me for the part. They lied about only being able to find one available in San Antonio, when afterwords I called multiple auto parts who all had one in stock for 150.00 less than what Pat charged me at SX Callaghan. He told me he couldn't take the part back even though my son had one at Oreillys auto parts. The final bill for a 15 minute part install including their diagnostic fee....$510.00. What a bunch of crap.....Stay away from these rip off con artist, and their leader Pat.