I see a shaver pro series 250 on craigslist used three seasons, with upgrades such as fan with damper, sight glass, digital temperature control with dry well, & additional insulation. 230 gal. rated for 5500 sq. ft. for $4000. I have been reading reviews on different brands & most for shaver are not good ie too much wood not much heat. Anyone here have one? An opinion? Good deal or keep looking? It is 120 miles away so I cant just go look at it .