For in-store pickup only and with stock varying by ZIP code, Kmart offers the GE 8-Hour Two-Outlet Mechanical Countdown Timer in Black, model no. 06655, for $3. That's tied with our mention six days ago as a very low price for such a timer. (It's also a current low by $9.) It controls up to two devices and features a programmable timer.
Of note, Shop Your Way Rewards members will earn a Kmart credit with this purchase and may be eligible for additional credits and discounts.