Intex inflatable kayaks from the Intex inflatable boat collection:

Only $40.

"The Challanger K2 Kayak
Low profile for lakes and mild rivers!
Responsive design, easy to paddle!
Big, comfortable cockpit for easy entry and exit!
Two spray decks with inflatable support beam!
Rugged SUPER-TOUGH* Vinyl Construction!
Two adjustable seats with backrests
Inflatable I-Beam floor for comfort and rigidity!
Two Quick-fill, fast-deflate Boston valves on main hull chamber
11 Seperate air chambers!
U.S. Coast Guard ID
RWTUV Approved
Repair Patch Included
"