Tankless Water Heater Market Value
Analysis of 24,237 eBay listings for tankless water heaters to determine current market pricing.
What you'll usually pay
💡 Buying used saves about 25% here.
👉 In short easy summary
The best value is found in Corded Electric models, which sit 17% below the market median. Conversely, Natural Gas (NG) units command a significant premium, trading at 117% above the median.
💚 Best value for your money
Price by power source
Why? Prices vary by fuel type, with Natural Gas at 389.99 and Corded Electric at 149.45.
Price by voltage
Why? Higher voltage requirements correlate with different price points, from 220 V at 54.97 to 240 V at 201.24.
Price by mounting location
Why? Specialized outdoor units (195.69) cost more than versatile indoor/outdoor options (68.45).
Price by heating system
Why? True instantaneous tankless systems (199.99) are more expensive than storage tank hybrids (85.36).
🛒 Some on sale right now
Common questions
What is the price difference between new and used tankless water heaters?
New units have a median price of 162.49, while used units have a median of 122.5.
Which power source is the most expensive on average?
Natural Gas (NG) is the most expensive with a median price of 389.99.
Are under-sink models cheaper than indoor-only models?
Yes, under-sink models have a median of 112.93, whereas indoor models have a median of 179.99.
How we got these numbers
Worked out from 200 live eBay listings (price range $30–$658, odd outliers ignored). These are asking prices, so use them as a guide. Last checked July 26, 2026.