I would strongly suggest that you avoid buying a UK cam and sending it to the USA. As mentioned already the PAL vs NTSC is a
BIG problem that there is no easy way around. Also what if the worst happens and you need to get it repaired, Sony etc are unlikely t owant to offer a free repair in the USA to a UK model.
What I suggest you do is look for a cam on an American web site such as
www.amazon.com and buy it and getting them to deliver it as a gift. Any problems then your friend in the USA can just arrange the repair as it will be an American model.
Mark.