Selfridges, Harvey Nichols, Liberty - I like a selection as I am not attached to a particular designer and prefer the less initimidating environment to the specialist boutiques of Bond and Sloane Streets. Net-a-Porter, Matches and Browns have served me well when I am ready to buy on-line (i.e. when I know what I want). Ebay has tempted me, but seems high risk and friends also tempt me but are very low risk!