To answer the original post, i went to the US for work a few months ago (about November). Work for me is near 3rd Ave CA and there are plenty of kite shops there but it was just after end of season which is great timing for buying cheap. The wind there is crap over winter and the gear is very seasonally purchased. I went to two shops and both had huge end of season discounts. I bought an Underground FLX42 (ironically made in NZ) for USD$399 (Aus$marked down from about $799 so i reckon that is a bargain. I freighted it home via inter-office mail at work (don't tell them it's not a server). Funily enough the guy in the shop was telling me the local gear made at Santa Cruz etc was all local rubbish, it's funny how imported kit is always supposedly cooler wherever you are.
I found the price of kites worked out about the same from what i saw, however he had some great deals on 05 model second hand kites but i didn't buy one.
I am guessing the web sellers don't have off season sales as good as the shops so I'd try finding the small shop's websites, some of them list their clearance deals then maybe buy from them delivered same/next day to your US location. Also keep in mind many US shops cover snow boarding as well as kiting so you might find some kiting shops near the snow you are going to.
I found the kite shops where i was going using this page:
http://www.sfkitesurfing.com/I just had a look at this page
www.asdwindsurfing.com/kite.htm and they have these "blowouts"
2005 KITEBOARDS
North Dragon Small 399.00
North Sumo 148 325.00
Naish Haze 153 325.00
RRD TripleX 128 299.00
RRD Triple X 130 299.00
RRD BS 160 249.00
To the shop guys, i bought almost all of my other kit locally but if i am in the US and at a kite shop and can buy a board for about half price i will do it and did. Peace :)