well i'm new here and i was just looking around for my nissan sentra. im about to take out the factory installed stereo and putting in sony's CD player and i talked to few people at circuit city and they said they will cost me extra bucks just to install some radio wire or something i have no clues about audio system and im looking for some advices about if i can install it my self or should i just go with free installation at circuit city and some extra extra info you guys can throw in
