I've managed to hunt out a couple of CE's.
I found one that was beat up and didn't have the original case, it was still £200 more than I paid for mine, which isn't beat up at all, just has the McCarty switching.
I also found one for about the same price as mine. It was older but it has non original pickups, a re-fret where the gaps under the fret wire haven't been nicely filled. extra holes from a 3 screw trus rod cover subsequently replaced with an official PRS one, and it has had a really poor job done on changing the nut. No idea about the wiring. I'd guess it's carrying a few scars too.
It seems like if you can find a regular dude wishing to sell one, you can get a deal. Buying from a store seems to lead to paying more than I'd expect. I think I was really lucky. I think the teal CE that was in the seconds out here went for £620 on ebay, and then I'm sure it appeared on brighton gumtree for £950. Seems to be quite a wide range on what things can be found for.