Well, if you're going to sell it, it'll be worth much less with a cracked blade so I'd take the S30V and go. It'll go for less than it would have, but unless I'm wildly out of the loop, I don't think it's going to make much more than about $75 difference in a user (spa treated is still not mint). Annoying to be sure, but as others have mentioned--since you used it and didn't keep it mint, I'm guessing it wasn't originally intended as an investment piece.
As to S30V vs BG-42, I also side with those who prefer the old versus the new, primarily because the old blades were run harder than the new and thus held an edge better for most cutting that I typically do with a folding knife (much as many here like to pretend differently, the actual difference in performance when at the same hardness is almost indistinguishable between these two steels, though S30V is a tad easier to machine). The downside of them being harder, of course, was that they were more brittle. I'm still surprised at the cracking here, but I'd say that may have had something to do with Chris Reeve dropping the HRC on his blades a couple points on the newer ones.
Overall, it's a bit of an unfortunate situation, but I think we can be confident that it's not one that CRK brought about intentionally, and the solution they offered is about as good as you're going to get. If you want to haggle, I'd push for a S35VN blade (which may or may not actually be better but it still has that new-car smell on it as far as potential buyers are concerned) and run with it.