I am not a serious student of the woodburning discipline but a review of this site indicates this is the place to start my education. My son just bought a home with a Lopi Models X, FL & LX installed 1986 Fireplace Insert (as taken from the manual) which the inspection company advised was oversized for the fireplace chimney. The house seller had it professionally replaced as part of the sales agreement with the installer stating the old insert was in great shape and not to discard. I am also in the process of building a small cabin (500 sq. ft.) and plan to install a small freestanding burner. I would like to offer the insert for a freestanding burner in a fair and reasonable trade but do not know what to ask for or how to value the insert for such a trade. Advice?