I don't know specific numbers released. I know that DST and Hot Toys are both very secretive about quantities produced of non-exclusives, and wouldn't be surprised if Medicom was the same. However, I can tell you that value will be determined by not only production number, but demand. A rare, carded Boba Fett may exist, but given that there are umpteen thousand loose versions of the same figure, and 20 or so variants of him, his price won't be likely as high as a distinctive, reasonably hard to find and somewhat popular one-off character in the short or long run, in my opinion.
As for what something is worth, that depends on how much you want it of course. If it doesn't seem outrageous to you, then it isn't. If it does, then it is. If you are a Kubrick completist, however, then I pity you and your bank account.
As for your belief that these will be worth more in decades to come, I respectfully disagree. I don't think the Kubrick line will last that long, and when figures stop being produced, I think interest will wane and value will go down. Just my hunch.