Ends 2/20 at 8AM PT. eBay is offering an Extra 20% off Select Orders $25+ with coupon PRESDAY (requires via Paypal checkout). Limited to one use; maximum discount is $50.
Ends 2/18. Groupon is offering an Extra 20% Off Local Deals with coupon SALE3. You can get up to three local deals per account; maximum discount of $50.
Also get an extra 10% off goods and travel deals with the same code.
Ends 2/19. 6PM is offering Up To 84% Off A Selection Of Men's And Women's Apparel, Shoes, And Accessories as part of their Presidents' Day Clearance Sale. Shipping is $3.95; get free shipping on $50+ or when you buy at least two items.
Ends 2/20. Hanes is offering Up To 75% Off Its Clearance Items. Shipping is free on all orders at checkout. Includes lots of cheap underwear, sweats, basic T-Shirts, etc.