i bought my keystoker used 2 years ago on craigslist. we paid $700 for the stove. so far this thing is saving us allot of money over the pellets we used to burn. we would go through 5-6 tons or more per winter of pellets. $1,200-$1,400 per winter when we stopped burning that garbage. so far i bought 4 ton last winter and 5 ton this winter that just ended (the price actually went down so i had them deliver an extra ton). so we bought a total of 9 ton and we probably have close to 3 ton left now. so were averaging 3 ton per winter (roughly). this is an old, drafty farm house, that's cheap to heat this house...... really cheap. figure $200 per ton and 3 ton per winter we are in the $6-700 range, and the house is better heated. if we buttoned this house up a little more we would be even cheaper off. i cannot complain, in fact im thrilled with it. i will never burn pellets or natural gas ever again. im not wasting money on these expensive, computerized "high efficiency" gas furnaces either. the things are complex, expensive, and made to fail. my stove is 10 years old, purchased used and will probably last a couple more decades. my inlaws bought a brand new natural gas high efficiency furnace 4 years ago, they already had a $300 repair bill because it was out of warranty (the electronic control blower failed).
coal is hot, cheap, and simple. i would recommend coal to anyone that wants to save money on not only the heat but the heating appliance. it takes a little bit of work but the savings are well worth it. a dollar saved is a dollar earned.