Value Massage via eBay offers this Ergonomic Mesh Mid-Back Task Chair in Black for $48.88 with free shipping. That's $12 below the lowest total price we could find for a similar chair elsewhere, although we saw it for $4 less three weeks ago. It features a metal base with an adjustable height of 19" to 23".
What are you doing for fun that you could also do for money? Here are some ideas to get you thinking, and tips to get you started.