it's been a little bit since I brought from eBay US. I do (and did) a bit of buying from the USA and sometimes would have it sent to a cousin in the USA to forward it to me which could be a bit cheaper sometimes, but was atleast alot more trustworthy to come through right.
If you use the eBay 'pay it all so you don't have to worry'... some say don't do it cause it's a ripp-off cause you might pay more when it should be but to tell the truth, sometimes it's worth it even if you end up paying a bit more.
it's.. always tricky to say 'list it as gift' cause yeah.. that is fraud. Always has been. And more chance of not getting stuff because of it.
So if they will just sell via the eBay one-pay thing (forgot what it's called these days.. international shipping or something) then that might just be worth it more. though the USA are currently charging there citizens huge mark-up on shipping and receiving stuff for some reason and I believe political relations with the UK aren't great right now, so shipping may cost a bit more because of these things.