UK Macs for USA use

[freelife2g]

Just when I was about to purchase a used G5, (thanks to all the experts who coached me on my last post) I saw a deal for a Mac Pro. I got all excited because the fellas told me that this it what I really want and the deal was right. I emailed the seller and it turns out he's in London/UK. Claims the Mac is new in box and wants to ship via Chronopost. Sounds ok since he claims I can inspect before I release the funds thru Chronopost(I'll have to do some homework on that first though) but my main concern is compatibility in the US. I'll need some kind of converter I think. Can anyone help me out and shed some light on this subject.