I got one of these for under $20 shipped.
https://www.amazon.com/XtremepowerUS...T0RVJ004NTKVJA
https://images-na.ssl-images-amazon...._AC_UL115_.jpg
I tested it out with an oil change on my BMW and it was quick and easy. LOVED it.
I'd at a minimum ask for a breakdown on what they charged you for parts and labor!