IKEA Renberget Chair - $30 (san mateo)

One IKEA Renberget swivel office chair used for ~4 months, is in excellent shape, and is fully functional.
See https://www.
ikea.
com/us/en/p/renberget-swivel-chair-bomstad-black-20503284 This swivel chair has adjustable tilt tension that allows you to adjust the resistance to suit your movements and weight.
To adjust the tilt tension, turn the knob under the seat to increase or decrease the resistance.
The shape of the armrests provides good support and helps you find a good sitting position.
The stitching pattern on the backrest gives the chair an elegant and clean look.
You sit comfortably since the chair is adjustable in height.
The safety casters have a pressure-sensitive brake mechanism that keeps the chair in place when you stand up, and releases automatically when you sit down.
Soft yet hard-wearing coated fabric is easy to wipe clean.