7 1/4 Sure Grip rear end value

I’ve seen a few 7 1/4 rear ends with Sure Grips sold, but nothing in the last three years. What’s the market for a complete 7 1/4 Sure Grip rear end and also for just the carrier? I know 7 1/4’s are hated by most and is not worth much, but the Sure Grip 3rd member is rare and has some value. I ask because I’m interested in rebuilding my open 7 1/4 and putting a Sure Grip 3rd member in it. I might sell it if there’s someone who needs/wants one, or just keep it and trade back into my current car when and if I sell it down the road. I have free time and it’s not something I’m not looking to make any real money off of. There’s a 7 1/4 Sure Grip, drum to drum available on FB marketplace and the guy wants $800 for it. That seems ridiculous to me. I figured 4-$500 would be the range, considering you can basically get an open 7 1/4 for free.

$800.00 and it’s probably toast, it’s almost impossible finding the clutches. I had two 7.25 suregrip one stopped spinning after a couple month of laying the hammer down.