One King's Lane
I only found out about this site a few days ago, even though it was mentioned in the NY Times last month. One King's Lane offers online sample sales for housewares and furnishings; you can save up to 70 percent off the retail price. The site constantly lists new sales, with each lasting just 72 hours. This morning, the Dransfield & Ross sale launched, and past events have included merchandise from John Robshaw, Dwell Studio and Serena & Lily.
If you haven't already, I highly recommend signing up for a free membership so you can receive emails about their sales.