@chai2,
Generally, older irons last forever (unless dropped or abused). New irons, made in China, often times last 5 years on an avg...typically.
To the OP: Goodwill is a charity org that is located across the country. you can get great deals on furniture, small appliances and/or clothes, etc.
Don't bother with it, if it doesn't heat up past slightly warm. Before you toss it, try it with different low, medium and high settings on the thermostat. Sometimes a partially broken thermostat responds to a medium or high setting before it kicks in, if it'll work at all.