I will warning you, be careful because the problem is not USPS, the problem is the custom over there. Your preamp may be several months dead quiet in the custom area.guy wants to buy my preamp. I figure USPS is the only way to go out of the USA. anything I need to know? is Italy safe to send too?
Either eBay GSP as said or USPS global priority if it is confirmed delivery.
Italy customs sucks hard.
Warn the buyer about it.
I've seen 45 days to clear customs years ago.
Buyer got a little hot just before it arrived.
If it's not eBay GSP and it's USPS but they cannot confirm delivery, forget it unless they pay cash.
If you're doing it thru eBay, use the Global Shipping Program (GSP) option. That'll take care of your exposure if the item is lost/diverted/delayed/held for ransom by the postal or Customs authorities in Italy, which has been known to happen. Once you get the package to the Erlanger Kentucky forwarding facility, eBay assumes all of those risks.
John