Amazon offers Prime members the Intex Inflatable Empire Chair for $20.38 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $5.58.) That's the lowest total price we could find by $6. It features a 2-ply reinforced bottom, measures approximately 44" x 43" x 27" when inflated, and is ukulele compatible.
Note that your chair will ship in a random color.