Walmart discounts a selection of items with prices starting from 60 cents for it's Last Chance Deals. Choose in-store pickup to dodge the $5.99 shipping fee, or bag free shipping on orders of $35 or more. A couple of best bets:
Trivial Pursuit 40th Anniversary Ruby Edition for $18.88 (low by $17)
RCA 50" 4K Flat LED Ultra HD Television for $219.99 (pictured, low by $100)
Orders placed with free shipping by 2 pm local time on December 18 are expected to arrive in time for Christmas.
Before you spend another dollar on items and services like these, check with your public library. You will likely be surprised by what it offers for free.