I’d recommend craigslist hunting - you can usually find office closeout centers that are clearing out name brand quality chairs for decent prices. Usually you have to show up at a warehouse and pick the least stained one, but often times you can find a $1000+ chair for a couple hundred. Shipping is usually a big PITA and costs too much because of the size. Companies upgrade furniture and go out of business all the time, I took my Humanscale Freedom chair from work after they upgraded the whole office to the “Cheaper” Mirra chair.
I really like the Eames Aluminum group chairs which you can usually find in that $200-300 price range. Super comfortable and the arms get banged up easily, but they’re pretty indestructible otherwise.