How much does this cost to the nearest dollar?

Tankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant Temperature, Indoor (Natural Gas)
NOTE This product does not have a serial number. If you don't know how to install a water heater at all, it is recommended not to buy it. Tankless Instant Hot Water Heater No need to preheat before using the tankless water heater. As soon as you turn on the tap, the water ﬂows with your desired temperature.NOTE This product does not have a serial number. If you don't know how to install a water heater at all, it is recommended not to buy it. High Sensitive Touch Led Display Comes with smart digital LED display high-definition large screen, freely adjustable the temperature between This product does not have a serial number. If

Price is $270.00
Price: $269.99