Get Me A New Office Chair

I'm big. Not like HUGE, but I'm big. I'm a heavy girl. My personal office chair of several years finally bit the dust after almost equally many years of being broken. I just can't afford a new one, so I'm reaching out for help to cover the costs of a new one. Due to my densely compact weight, I need an office chair with a heavy duty piston to support me, lest I return here again in 6 months for a new one yet again. Mind helping me out ?