Today only, until 5 pm ET, Madison Sporting Goods via eBay offers the Mongoose Girl's Exlipse 24" Dual Suspension Mountain Bike, model no. R3301, for $119.99. Coupon code "C15SPRING" cuts it to $104.99. With free shipping, that's $95 off list and the lowest total price we could find. It features a steel full suspension frame, suspension fork, SRAM twist shifters, 21-speed Shimano rear derailleur, and lightweight alloy rims.

Note that this coupon can be used once per PayPal account.