Walmart offers the Pelonis Electric Oil Filled Radiator Heater, model no. HO-0250H, for $27.88. Choose in-store pickup to dodge the $4.97 shipping fee. That’s a buck under our mention from a week ago and the lowest price we could find by $21. It features three heater settings, safety tip-over switch, adjustable thermostat, auto-shutoff for overheat protection, and heavy-duty caster wheels.