If you check ebay (uk version, but they should have them on all of them), you can buy an Airline guitar for about £250, that is exactly the same as the one Jack White (white stripes) uses.
gitaardocphil, have a look at the musicstreet website when you get chance, most (if not all) of the guitars they sell are at least £50 less than the rrp. The PRS guitars there are very cheap, but I think they only sell the korean versions.
What do you think of this website:
www.warmoth.com
They sell guitar parts, bodies, necks, etc. and custom guitars. It's cheaper to buy a custom Jaguar from them than buy one from Fender!