The estimated prices that everyone, (so far,) are spot on in my opinion.
Another important part is how many magazines it would come with. These CS40 mags are getting very expensive. I’ve been lucky in finding them in the last few months for good prices, (excellent and new condition under $50.00 received.) I’ve seen them offered and sold for way to much.
I don’t technically have a CS40, just a complete top end for my CS45, kinda like a “convertible” CS45/40. The only problem was getting the .40 magazines cause the CS40 top end I got only came with one. I’m all good there now though but not excessively hoarding.
Jim