why not add a forum for car audio and video products ?
there are so many company making those products
i think people can purchase them here
for example: http://www.fiyco.com.cn they got so many car dvd and GPS for Chinese car
BYD,Cherry,The Great Wall/ and etc

Right now threads can be created in "General Discussion" with different posts separating the audio and video products. There needs to be a active group posting information or it will just be an unused forum.