I have a 7" LCD monitor surplus to requirements. It clips over your existing mirror and when on is an LCD monitor with 2 video inputs via standard RCA connectors and when off is a mirror. Excellent for towing. Complete with instructions and remote ( why you would need a remote I don't know) and is in as new condition in box. I have no camera for it but you can get a camera (or 2 cameras, 1 for your car, 1 for your van) on Ebay at a good price.
I'm asking $50 for it (inc post), similar sell on Ebay for $99 up, retail expect to pay around $150.
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KIA Sorento CRDi EX ( Ebony black) with 5 hex chrome plated tire air valve covers, Coramal Sunsheild, Elcheapo GPS, First Aid Kit, full KIA toolkit & Yellow lenses on the Foglights......