Hi, a co-worker of mine is interested in buying my 10 yr old stove, if I can give him a good price. I've put over $350 worth of new parts in it this season (convection blower, ignitor, thermocouple, door gasket), I would include the hearth pad and thermostat. Is $600 a fair price? I've no idea what it's worth. Look on Craig's List but there wasn't much in the way of used Quadrafires. Thanks!