On online shopping: sample sale sites

I'm a big subscriber to online sample sale sites. At a certain time each day, they feature several brands at 40-60% off (on average), sometimes more. Plus, no tax! I enjoy exploring new brands and styles using these sites although I hardly purchase from them. A downside to them is that they rarely offer free shipping and free returns, so a careful inspection on measurements and material is warranted. Most sites also have other categories such as home and food.

Brands I've bought from these sites:
French Connection - prices often lower than "final sale" from the FC store.
Kische
Lacoste
Jack by BB Dakota
Romeo and Juliet
Via Spiga
Amrita Singh

Here are images and links if you want to explore!

HauteLook
A personal fave; their prices are generally lower and their shipping is prompt. They feature more accessible brands such as American Apparel, Calvin Klein, etc. I enjoy their 'daily feature' item which is often 60%+ off. Keep an eye out for their 'blowout' sales, which are often at least 60% off. Items are reserved for 15 min in your cart. Shipping is $7.95.

Ruelala
Personally, the prices are not as appealing as some of the others. They sometimes feature very, very high end brands such as Chanel, Prada, Hermes. Shipping is $9.95 + free shipping for the next 30 days.

Ideeli
Their prices can be a steal, but their shipping is often 1 week post-sale. I like their user interface as you can sort by size and brands. Items are reserved for 10 min in your cart. Shipping prices are $9.95 + free shipping for any purchases in the next 30 days.

MyHabit
Amazon's sample sale site. I love their range of brands! Prices are also reasonable but sometimes extraordinary - Delman flats recently went for < $25! Items are reserved for 10 min in your cart. Free shipping and return is also a huge win. I haven't bought anything from it yet (too sloow).

Gilt Groupe

This site caters more to high/end luxury brands such as Valentino, Marc Jacobs, Anna Sui, etc. If you want that investment piece, I recommend this place to explore. Their prices are higher ($50+) than the other sites. Items are reserved for 10 min and shipping starts at $5.95.