Australian Customs website "When buying over the internet" informs that orders under AUD$1,000 from oversees do not attract import duty or GST in Australia.  However, orders over AUD$1,000 incur -

USA shops

Components:

                Beyond Bikes

                Bike Nashbar

                Bike Tires Direct, Portland, Oregon

                Cambria Bicycle Outfitter, California
                ICycles,

                JensenUSA

                Performance Bicycle

                Price Point

                Universal Cycles, Portland Oregon                 No Sales Tax

                Bikes:

                Bicycle Blowout  Reno, Nevada                      No Sales Tax if goods received outside Nevada

                Bikes Direct                                                     No Sales Tax

                Colorado Cyclist

                EuroBikeParts.com

                Golden Bear Bikes, Colorado                         Cannondale Road Tandem USD$2,249.99   Specification

                Kozy's Cyclery Chicago, Illinois

                Likebike Chicago, Illinois

                Precision Tandems, Kansas                           No Sales Tax if goods received outside Kansas   

                Richardson Bike Mart, Texas

                Tandem East, New Jersey                                

                Bicycle bargain search engine:

                Best Buys

        Australian shops

                Cecil Walker Cycles, Melb, Vic - no freight in Oz

                CellBikes, Stanmore NSW

                CycleLink Bayswater, Vic          

                Dean Woods Direct Albury, Vic

                Hillbrick Racing Sydney

                Moruya Bicycles, Moruya NSW

                Phantom Cycles Sydney
                Torpedo 7

                The Bicycle Store Woy Woy NSW

        England shops

                Geoffrey Butler Cycles Surrey

                Parker International

                Pro BikeKit   (Click on Australian flag icon on upper LHS to see sale prices in $AUD)

                Chain Reaction Cycles

                Wiggle

                Ribble

                Madison.co.uk 

                Shopwiki

        Northern Ireland shops

                Total Cycling Eglington Ireland

        Netherlands

                Bikers Store

                WielerWinkel

        Taiwan and China

                Bicycles B2B      

                Beijing Hanglun Sports Apparatus Co Ltd, Beijing City, China