Walmart offers the Mongoose Men's 26" Ledge 2.1 Mountain Bike in Black/Red (pictured) or Blue/Green, model no. R4050WMBDB, for $139.97 with free shipping. That's tied with our mention from three weeks ago and the lowest total price we could find for a similar bike by $55. It features an aluminum suspension frame, linear pull brakes, and Shimano rear derailleur.
Kmart offers the Mongoose 24" Boys' Spectra Bike, model no. R4080KMA, for $129.99. Plus, Shop Your Way Max members receive free shipping. (Not a member? It's free to sign up for a 90-day trial; otherwise, shipping adds $29.44. Free in-store pickup is also available.) That's $20 off list the lowest total price we could find for this boys' bike. It features a steel frame, pull brake lever, and front suspension.
Update: Apply coupon code "KMART10PSAVINGS" to cut the price further to $116.99.