I am looking to sell my Alpine D310 flipout touchscreen 7" monitor with Alpine VPE-S431 Expansion box to add extra monitors such as headrest monitors as well as additional DVD players and other misc. equipment and the XM unit that works with the unit. I have all wiring for steering wheel controls and the bypass so you can watch a DVD while driving i believe this part is called TR4. unit is in excellent condition not scratchs or marks that show any use what so ever. I only used this for approx. 6 months in my Silverado before i traded it on my 300 and have been debating on selling it or putting it in my 300, and i really would rather sell this and get my 22's. i have about $2000.00 in it but would like to get $900.00 or best offer. If you wanna see pictures e-mail me at [email protected] or PM me and i'll take some and send them to you.