PS5 and XSX: $499
PS5DE: $449
XSS: $249
I definitely think neither can go above 499, and they'll take a loss if they need to. It's a hard ceiling regardless of the cost of components.
I'm not sure about the PS5DE. It's only $25 lower BOM, so if they accept to take a loss on it to push more consoles, they would take a loss on both SKU and a little more on the DE. But there's an argument to be made about using it to reach a lower price point at a bigger loss, they'd lose less money overall by taking a loss on only one of them.
The XSS is in a class of it's own, it has a good reason to exist at $200 less than PS5DE. I think they'll take a bigger loss, put only 500GB of storage, and make up for the difference with proprierary storage upgrades. I'm not sure about that one either, $299 would sell well, but less dramatic and then PS5DE might quickly drop to 399 and it would become too close for comfort.