Jamie, this seller has been repeatedly asked for information on the car, he simply ignores any questions or has an excuse why he can not tell if the vin is in Polish. His camera was not working so he could not send engine pictures and he knows nothing about cars so does not know what mods have been done.
In the past he had spoken to the Italian that remembered this very car on the assembly line in Italy, being made for a well known racing driver.
This has now been removed from the listing.
If he simply answered questions honestly, proved the car is Italian, Bambino ( German name for the 126) edition, commissioned by Ferrari

.
Even if he looked at the VIN to see if it was Polish, that may help a little.
I think the guy bought the car, paid too much and wants to get his money back.
The same problem came up when this car was last sold a few years ago.