I have a 2005 Grand Caravan SXT and I want to add the OEM DVD system. My local dealer wants around $1,000 for the system and installation. Have you run across any websites (besides ebay) that may sell it a bit cheaper? And is this fairly easy to install? When we bought the van the salesperson said it was pre-wired for the DVD system so he said it would be easy and quick for them to install. Any advice is appreciated. Thanks.