Question: How much would a proper computer ergonomic chair cost? 

Answer: Herman Miller's Aeron is considered the most ergonomic chair for work desks. They cost anywhere upwards of $500, depending on the bells and whistles you choose.\n\nAlternatively, you could seek the help of an anthropometrist to design the most suitable chair for your body and then get it built by a local manufacturer.
This question from the Yahoo Q&A forum is categorized in the topic: Education & Reference