I would stay away from a big chain store such as best buy. They just don't carry solid equipment in general and if they do they want to charge huge sums of money. You can find good deals on amazon as others have said. There is also a site called caraudioclassifieds that has great opportunities to find new and used head units. These days be wary because head units aren't made like they used to be. A late 90's alpine,mcintosh,sony ES,or clarion dex will blow anything today away. Bottom line, find out what you are going to require or the unit(ipod, multiple cd, eq adjustability) and narrow your list from there.