Build.com via Walmart offers the Eccotemp L5 Portable Tankless Water Heater for $95 with free shipping. (Home Depot charges the same.) That's tied with our mention from a week ago and the lowest total price we could find now by $8. This 37,500-BTU water heater runs on liquid propane and features a shower head, garden hose adapter, and a 1.5 gallons per minute flow capacity. It uses two D cell batteries (not included).