Rear wing dilemma

The last Deck lid with the rib for a wing that I had. Sold for $650.00 on Ebay 10 years ago . And it had two dents in it. I would say thit lid would be worth more today. It would put the correct deck lid on a 72-76 car for a wing. The ad on Ebay stated." Correct 72-76 deck lid for a wing. Why put a 70-71 weaker deck lid on your car". I believe these were replacement Deck lids for Duster and Demons that would have came with a spoiler If crashed in the later 70's. The one I had didn't look to be original paint. It was peeling on the inside.