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Thursday 17 May 2018 at 10:54
Because of fluctuating exchange rates, hard for me to say, but it's a close race between The Hobbit SE and Alien Prototype.
Having been in this hobby over 30 years it's quite astounding to me what these games are worth today, I guess I'm lucky as the law of averaging has been on my side.
Source: http://pinside.com/pinball/forum/topic/what%e2%80%99s-the-most-expensive-pin-you%e2%80%99ve-ever-purchased/page/3#post-4402656