I've actually got a sealed Corsair SF750 sitting on my shelf. It was an RMA replacement for that product recall they announced a few weeks ago.
My ITX plans are currently on hold probably until AM5 launches, so I'd be willing to sell it.
The catch with me is that I'm in Canada and due to the border closure, can't cross the border to ship (which is how I've handled past sales to Americans). No idea if the cost of shipping would make the sale prohibitive.
Shoot me a PM if you're interested (I've currently got it listed locally).