Disappointing to find out how a present has been cherished that way...
In Ebay there's a way to see recent sales by filtering the search to "ended offers". Maybe you can try that for Ebay in your country.
For my country, it shows some PA3X in good working condition, which reached a final price of around 1,200 Euros, which would be about 30% of the former new price.
I would have expected more, as I've sold some of my 3-year-old synthesizers for far more than 50%, but it obviously depends on which leap the succeeding model has made...