Amazon offers the Evenflo Maestro Booster Car Seat in Black/Blue, model no. 31011703, Taylor, model no. 032884186013, or Wesley, model no. 31021433, for $63.99 with free shipping. That's the lowest total price we could find by $16 (outside of the mention below), although we saw it for $5 less in November. It features a harness mode for children from 22 to 50 lbs., seatbelt mode for children up to 110 lbs., compatibility with LATCH systems, cupholders, auto-adjusting belt path, and about twice the recommended federal side impact and structural integrity safety ratings.
Of note, Sears has it in Wesley for $74.99 with free shipping. Plus, you'll receive about $10.75 in SYWR Points. (Not a member? It's free to join.) Shop Your Way Rewards members may be eligible for additional credits and discounts.