Brand new, never-used, high-end Yeti backpack beach chairs.
This is the product:
https://www.yeti.com/outdoor-living/26010000360.html?
Breathable, UV-resistant material supports up to 350 lbs without losing elasticity
Lightweight frame folds out quickly and packs down flat for easy carrying and storage
Multiple reclining positions and waterfall headrest offer maximum comfort and nap-ability
They sell for $300 each; I'm offering both brand new chairs for $450 total.