Yes if you want a cheap stereo system
Yes but I would shop around. Some places have better prices and/or techs to do the install.
Yes they do. I would advise you do a little research on what kind of stereo your car has. Is it a single din stereo or double din? The way my truck is designed I can't put a double din stereo and it unless I want to modify and fabricate my own dash. Basically I am just advising you do your research and make sure whatever stereo you decide to buy can actually fit your vehicle.
Ya and there decent stereos
Yes depends where you are.
Yes
i believe so
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