unusual Schlitz lighted, motion beer sign

I've had this Schlitz beer sign for about 25 years. It is 49" wide and about 22" high. I have never seen one like it anywhere else. Does anyone have any info on this sign? I could take it down by myself, and look on back but it is rather cumbersome and don't want to take a chance on dropping it. Any ideas what it might be worth, as I'm thinking of putting it on ebay.