Madison Sporting Goods via eBay offers the Iron Horse Men's 29" Sinister Dual Suspension Mountain Bike in Blue, model no. IH7084WM, for $279.99. Apply coupon code "C20SPRING" and check out with PayPal to drop the price to $229.99. With free shipping, that's $20 under our mention from three weeks ago and the lowest total price we've seen. (It's also the best deal we could find today by $98.) It features an aluminum frame, trigger shifters, and disc brakes. Coupon expires March 27.

Note: This coupon can only be used once per account.