Is there an Office Liquidators near you? If so I’d pay them a visit. Most companies sell office furniture incredibly cheap, because they don’t want to pay for disposal.
If you want a decent chair, with an excellent price and warranty I have an IKEA Markus—the black leather one. It doesn’t have a lot of adjustment options, but it works well for me. I understand wanting something better though.
Also, I changed the category to #recommendations.