we installed a propane insert this summer when oil was through the roof. We used it as the primary heat source until a couple of weeks ago. Our prebuy price was $3.50/gal for 250 gals. We averaged between 3 and 4.5 gallons a day using just for heat and cooking. I am nearly out of the 250 gals prebuy so I called today to see what the new price is and they said based on my usage it would be 3.60 but would continue to honor the 3.50 price. I thought it would be cheaper given our usage but maybe we don't use much. I have no frame of reference, so... How much do you use and how much do you pay for it? and where are you from...we're in CT. Thanks.