Intex Airbed (air mattress) with Built-in Electric Pump

I have two inflatable mattress. Bought them last month and have used them just once.
Original price on amazon is $34.

Description:
Inflatable twin airbed with built-in electric pump for home use
Waterproof flocked top with vinyl beams, sturdy construction, and built-in pillows for added comfort
High-powered, built-in pump makes inflation and deflation easy, inflates mattress in approximately 3 minutes
Double-layered wave beam interior construction, raised 16.5 inches from floor. Material: Nylon
Standard twin size - 39 x 16.5 x 75 (W x H x L) - great for fitted sheets, 300-Pound capacity

Link:
https://www.amazon.com/Intex-Pillow-Raised-Airbed-Electric/dp/B000HBILB2/ref=sr_1_15?ie=UTF8&qid=1531350653&sr=8-15&keywords=air+mattress