I applaud your effort here. Setting a price for a rare watch with practically no comparable sales is a crapshoot. It evolves into a game of who's buying and how motivated might he be / deep are his pockets.
One can hold out asking for the moon for years only to finally find someone willing to blow away the top of market because money is no object to him. That doesn't 'prove it was worth that much.' It means a fool rolled by willing to part with wads of money.
As a parallel, I spent 2+ years hunting down the rarest variation of the SKX007, namely the SKX169. It's just a 7S26 inside so no value in the movement, just a bog standard SKX007/009/011/etc. case so no high dollar value there, using the silver ornate 7002 2nd gen style bezel as used on the SKX171, so again no value in the parts, but there were so few made ardent collectors like me will pay up to $1,000 for it - thus proving it's the rarity and not the underlying cost to manufacture. I got mine at a price multiple of 2 or 3 or even 4 for an SKX009 but frankly I was prepared to go much higher because it was a real journey to find the one I got.
I liken it a bit to those cars on Mecum Auctions on TV, every now and then 2 gentlemen won't be outbid until there is a winner who grossly overpaid and a very happy seller who did not deserve to get that much money for that ride.
One can hold out asking for the moon for years only to finally find someone willing to blow away the top of market because money is no object to him. That doesn't 'prove it was worth that much.' It means a fool rolled by willing to part with wads of money.
As a parallel, I spent 2+ years hunting down the rarest variation of the SKX007, namely the SKX169. It's just a 7S26 inside so no value in the movement, just a bog standard SKX007/009/011/etc. case so no high dollar value there, using the silver ornate 7002 2nd gen style bezel as used on the SKX171, so again no value in the parts, but there were so few made ardent collectors like me will pay up to $1,000 for it - thus proving it's the rarity and not the underlying cost to manufacture. I got mine at a price multiple of 2 or 3 or even 4 for an SKX009 but frankly I was prepared to go much higher because it was a real journey to find the one I got.
I liken it a bit to those cars on Mecum Auctions on TV, every now and then 2 gentlemen won't be outbid until there is a winner who grossly overpaid and a very happy seller who did not deserve to get that much money for that ride.