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".
If you're at least 62 years old, you can score a $10 lifetime pass to America's federal parks and recreational lands. But act quickly because fees are about to jump.