Home Depot offers the Eva-Dry Renewable Mini Dehumidifer, model no. E-333, for $14.97. (Amazon has it for the same with free shipping for Prime members.) Opt for in-store pickup to avoid the $5.99 shipping fee. That's the best deal today by $3 and the the lowest price we've seen. This dehumidifier uses a renewable silica gel technology that works without batteries or power.