I'm looking into buying a single or double din DVD / navigation receiver For my Nissan Frontier. I don't know much about car stereos. I don't really need the navigation do to my phone having ita but I would like Bluetooth. What are the advantages of a double din opposed to a single DIN? What brands should I stay away from? I'm looking at buying used. So my budget is around 250 to 300 dollars. Better yet does anybody on the site have 1 for sale? Thank you for your help