I've heated my house with wood and pellets for the past three years, using the oil boiler for domestic hot water. After researching for a few months, much of it on this website, I've decided to replace the oil boiler with a stoker. I've narrowed it down to a new Harman vf3000, or used keystoker ka6. Local harman dealer quoted me list price and told me he can't service it, so I'm tempted to go to Heartline in NH to try to get a similiar deal as sandman ...but would be willing to drive to pennsylvania for a deal on a used or refurbed keystoker. Can anyone suggest sources for used/refurbed units? And how much I should expect to pay?