New to the Pellet insert world. Have been looking for a pellet insert and checking with a local dealer who has a used Whitfield Advantage WP2. He says he took it in trade of a gas unit. He says it works fine, will give a 30 day warranty on it. Sticker on the unit shows it as a 1995 model. The unit seems clean and well maintained (from my untrained eye) He is asking $1000.00 for it. Basic question is should I go for it? Looking for pros and cons.