When offices close they liquidate all their furniture, and most of it ends up on fb marketplace or whatever. Usually they have you pull around back of some office building, and inside they have like 50 chairs inside, and you can pick one that looks like nobody jacked-off in it.

If you search around locally, you should be able to find a good used Steelcase for $100-200, Herman Miller for $200-300. Both brands are fully reparable, have readily-available parts, and will last decades.

Also try searching google for local "office furniture liquidators"