Walmart offers the Marvel Avengers Age of Ultron Captain America and Marvel's War Machine Figures with Blast Cycle for $7.59. Opt for in-store pickup to avoid the $5.97 shipping charge. That's $7 off list and the lowest price we could find. The blast cycle features a launcher.
Note: Amazon has it for $6 as an add-on item when you spend $25 or more. Plus, Prime members bag free shipping. (Non-members can spend $49 or more to qualify for free shipping.)