A used Driftsun "Voyager" inflatable kayak, with pump. It's a double kayak, but may be better for one person, or one person and a child...not a lot of legroom. Model: DS-VIK. Fun for floating around and paddling short distances. Not for taking a long journey by kayak. Comes with a sack. When deflated, rolls up into the sack. 10 foot long.
https://driftsun.com/products/voyager-2-person-inflatable-kayak
Fair Offer Policy applies