Had a Service call on my AC unit today. Technician...

Had a Service call on my AC unit today. Technician was nice and he knew what he was doing. So I was pleased until I got the bill. 539.00 USD to fill 5 lb. of R 22. If you buy a 30 lbs cylinder here, typical price is 16 USD per lb. So they charge a margin of 500 % to their customers. Offered me to replace the cooling coil for 3098 USD !! Street price for the coil is about 400 USD. They also wanted to charge 314-550 USD for a leak test.
Won't use them again.