Walmart offers the CAP Barbell 40-lb. Adjustable Cast Iron Dumbbell Set, model no. RSWB-CS040T, for $29.77 plus $2.97 for shipping. (Free Site-to-Store is also available.) That's tied with our mention from two weeks ago and the lowest total price we could find for a similar set by $24. Sales tax is added where applicable. The set includes four 6-lb. plates, four 2.5-lb. plates, two threaded solid dumbbell handles, four spin-lock collars, and more.