My farfalla isnt worth a $1000 at the moment but even at twice that it wouldnt leave the shed. I think the gen 2 zaccaria pins are very underrated and to me $1500 seems a fair price.
They are worth exactly what someone wants to pay for them
That's it in a nut shell
If some one has the cash and doesn't mind splashing out and doesn't want to wait then you will get the extra dollars you ask for.
I heard that a Simpsons PP went for $10k recently, I know this machine is on the opposite end of the scale to the machines we are talking about here but it happens