LightinTheBox offers the Rockefeller 21-Speed 26" 700cc Folding Mountain Bike in Red or White for $299.99. Coupon code "S2433266BIKE" cuts that to $209.99. With around $38 for shipping, that's $1,090 off and the lowest price we could find, although we saw it for $30 less in March. It features a foldable carbon steel frame and Shimano derailleurs.

Note: Uncheck "Add Shipping Insurance to your order" during checkout to remove the $5.99 fee.