I have one. new in box. OEM chevy p/n 14000078 just like the $650 one on ebay , with the 2 strips, but I don't have the emblem. but it is most definitely OEM, in the original box with the part #, and has the space to put the bowtie emblem.
I stumbled upon this forum doing a web search with above part # to see what its worth. I was planning to ebay it. ya $650 is a bit steep.... make me offer.....
My username on ebay is loudfastugly, I deal in mostly motorcycle parts, I have an '82 chevy work van that might need a part or two. I can post pics after Monday. its at the storage place. I ship fedex ground and I take paypal or postal money orders. checks are OK but I have to sit on it for a week til it clears.