Your buyer in Italy made their choice to buy your used Pinephone from you but it's nothing to do with us/community or Pine64.
Another choice they could have made was pre-order a new Pinephone, wait for it to be shipped to the EU warehouse in Poland. Then DHL shipping between Poland and Italy is two days. Italy is within the EU so no further duty or taxes to be paid - tax was already paid when the original order was made. For non-EU countries deliveries from China or Hong Kong via DHL also take only two days. PinePhones are produced in batches and are sold when the batches are available.
I hope the phone you sold to Italy does not become lost in the post you paid for insurance to cover loss right? Sadly, Italy has been stricken really hard by CV19+ so delays in their postal services are understandable no decent and understanding person would complain.
Another choice they could have made was pre-order a new Pinephone, wait for it to be shipped to the EU warehouse in Poland. Then DHL shipping between Poland and Italy is two days. Italy is within the EU so no further duty or taxes to be paid - tax was already paid when the original order was made. For non-EU countries deliveries from China or Hong Kong via DHL also take only two days. PinePhones are produced in batches and are sold when the batches are available.
I hope the phone you sold to Italy does not become lost in the post you paid for insurance to cover loss right? Sadly, Italy has been stricken really hard by CV19+ so delays in their postal services are understandable no decent and understanding person would complain.