OP tried to sell 2 pins here... apparently both did not sell.
Fireball - $1300 - good condition (pinside estimate: $830-$970)
Meteor - $1000 - some work needed (pinside estimate: $650-$750)
And on each he states price is negotiable.
My point being that OP appears to like to haggle on pricing he prices high, knowing it will sell for less, and offers low, knowing he will pay more.
Myself, when I sell things, I price it at what I think it's worth, or what I want to get out out of it (whichever is higher)
And when buying will offer what I think it's worth or what I'm willing to pay, which ever is lower.
So if I see a machine that I want to pay $2k for, but prior sales show that $1800 is what it's worth... I'll offer up $1700-1800 with links to the games that have recently sold, but be willing to move up to my max .
At the same time, if a game is listed at $3k but worth $2.5k and I only want to spend $2k on it, I'll only offer $2k, and if they don't accept it, I don't whine and complain about it. We live in a free market.