Brand new and in original shipping box (not assembled) rolling office chair that is missing one wheel.
Selling for $30 OBO, although it is sold new for >$100 on Amazon.

Replacement caster wheels that should fit this office chair:
https://www.amazon.com/dp/B01KEB2LDI/ref=cm_sw_em_r_mt_dp_U_V1DeFbF4A5TY5
or
https://www.amazon.com/dp/B00UCJ4ONS/ref=cm_sw_em_r_mt_dp_U_0QDeFbXF5P19N
among many other replacement wheel options on Amazon.