I constantly shop online....some of my favourite sites are http://www.witchery.com.au and http://www.minkpink.com I also shop heaps on Ebay and am trying to get my store up and running http://www.emmickboutique.com
I love a small online boutique selling sunglasses, jewelry and accessories called KeyPieces at http://www.designerkeypieces.com. Their items are all authentic and they do great discounts on the big names. I bought my Glam Rock watch there and saved 70%..great service too.
I've had mixed experiences with Ebay..lot of fake items but sometimes you get a genuine seller. Asos.com is another great store in the UK, lots of choice and fast shipping.
My poor credit card!!
I have recently discovered the site 'Gumtree'...This site tells you about vintage/garage sales in the area you live and sells everything! I picked up a genuine paris leather jacket for $15, in perfect condition and lace up ankle boots for $10-I'm always on the look out for 'different' pieces @ a great price. Also "FashionToast" Rumi Neely's blog sells her clothing and finds on 'Shoptoast'-Take a look! Ax