Hello Philip,
Apologies for the delayed reply and hope you see this message.
I think it would cost around $40USD to send to Virginia, and I always try to pack things really well.
As for how old the head is, I bought it new, it perhaps had 12 hours of "on" time, probably less; of course the heating element stays on throughout the printing session and I have always unplugged the heater when not in use.
I have not used the head for several years, having switched back to condenser with LED, but I do not recall any significant humming.
Regards,
Peter