If the game sells - I guess that what ultimately decides.
Sure... sounds simple enough.
But let's take my fictional friend John for example. John decided to buy his first machine and it just had to be his childhood favorite Bally Evel Knieval. He looked everywhere and couldn't find one. Finally he happened to go visit a local coin-op retailer or maybe he responded to a kijiji ad from one of the many "flippers" and he comes home with an EK and it only cost him $5K... but hey, it was all tricked out with LEDs
Now, we've all known (or been) guys like John or we've heard similar stories and (normally) we just shake our heads and attribute it to him being a noob, or getting sucked in by a retailer, or simply having more money than brains. However, what we don't immediately do is equate that sale with the price of an EK immediately being $5K. So, why do we behave differently when that same buyer happens to make that same dumb purchase from a collector; maybe even someone we know?
This is where we separate the reasonable (dare I say "fair") seller from the profiteer.
The fair seller will still understand that an EK normally ranges between $1200-$2000 and list it for that. The profiteer will try and use poor dumb John's experience to his advantage and point to it as a barometer for his overpriced EK listing... when all along his only purpose is to be a parasite and suck as much as he can from an unsuspecting buyer.
Let's be honest, when one of these guys posts an overpriced machine they aren't marketing to the general pin buying public; they're hoping to hook some poor sap like John.
Sorry for the long-winded allegory but, until we can all be well informed buyers and all sellers become reasonable and fair, any price discussion is just a pure waste of time.
Now, when EK start listing and selling for $5K on a regular basis, I will be in total agreement with the above statement
Anyway, like I said before,
let people sell for what they want. The market will dictate worth.
For myself I will list pins according to the value I attribute to the game and my labor... not to the USD or because some whacko overpaid for one once upon a time.