I think you're right TriangleP. All of the technologies needed to fabricate most any particular warbird from scratch already exist. As long as there are factory drawings available via the Smithsonian or somewhere, and preferably a surviving example for physical reference, the one limiting factor remaining is cubic dollars. With the massive rise in warbird value we've witnessed over the last 20 years, I think the cap on the value of a particular type will ultimately be set by the actual cost it takes to reproduce one from scratch. Until we reach that point, costs will continue to escalate, and will escalate still beyond that for original surviving examples.
I remember $150,000 Corsairs back in the day - the price of a decent house, and I actually thought I might be able to buy one when I grew up!

Never in my life did I imagine I'd see $3,000,000 Corsairs on the block, but that's where they are at the moment. There are a handful of old Corsair data plates floating around out there, and more than a couple of fabricators whom I feel could successfully scratch build an example pretty much from scratch. As soon as the market will bear it and someone's has the finances to give it a whirl, I have no doubt we'll see it happen. We've already reached that point with Mustangs, Spitfires, A6M Zeros, FW-190s, Mosquitoes, Me-262's, Yak-3s, etc. If only someone could fabricate and certify a scratch built DB-601/5 engine, the warbird world could have a heyday with the Bf-109, BF-110, Do-215, Kawasaki Ki-60/61, Heinkel He-100,Macchi C.205, etc!
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Rob Mears
'Surviving Corsairs' Historian
robcmears@yahoo.comhttp://www.robmears.com