Walmart offers the Pelonis Electric Oil-Filled Radiator Heater, model no. HO-0250H, for $29. Choose in-store pickup to dodge the $5.97 shipping fee. That's the lowest price we could find by $17, although we saw it for $5 less in April. It features three heater settings, safety tip-over switch, adjustable thermostat, auto-shutoff for overheat protection, and heavy-duty caster wheels.