This is by far the worst car buying experience that I could imagine. They are rude, abusive and demeaning. The company flouts the law and does not care. They advertise cars and then add $500 to the price when you arrive, this is in direct violation of Massachusetts regulations, when questioned they become more abusive (particularly to women and young people):
940 CMR 5.00: MOTOR VEHICLE REGULATIONS: 5.02 (3) It is an unfair or deceptive act or practice for a motor vehicle dealer to advertise the price of motor vehicles unless such price includes all charges of any type which are necessary or usual prior to delivery of such vehicles to a retail purchaser, including without limitation any charges for freight, handling, vehicle preparation and documentary preparation, but excluding taxes and optional charges for the dealer's preparation of title and assistance in registering a vehicle.
5:02 (6) It is an unfair or deceptive act or practice for a motor vehicle dealer to fail or refuse to sell a motor vehicle in accordance with any terms or conditions, including price or warranty, which the dealer has advertised or otherwise represented. https://www.mass.gov/doc/940-cmr-500/download
If this happens to you, you can file a complaint with the Massachusetts Attorney General at: https://www.mass.gov/how-to/file-a-consumer-complaint
When asked about the warranty, they try to sell you an "extended warranty" without disclosing the price, merely quoting various payments without proper disclosure. Many of the used cars did not display the required FTC Buyer's guide: https://www.consumer.ftc.gov/articles/0055-buying-used-car#dealer
You can file a complaint here: https://www.ftccomplaintassistant.gov/#crnt&panel1-1
If you are subjected to their unfair, abusive and illegal sales practices please file a complaint with the attorney generals office and become familiar with Chapter 93A of the Massachusetts General Laws, you could receive treble damages, plus attorney's fees. https://malegislature.gov/laws/generallaws/parti/titlexv/chapter93a