I've found a used Quadrifire 5100i on CL, I can't beat 'em down any lower than $900. It's 3 years old, has already been removed from the house, cleaned, and put in storage. It has a large surround, glass has a little discoloration, door seal seems fine, bricks are in place and intact, anything else I should check? Another question is on the liner, they still have it installed in the house but I can go by and remove it if I want it, what are thoughts on doing that? ....and lastly if I get a bill of sale and a certificate from Quadrifire can use this for the biomass tax credit. Thanks in advance for the help and advice....what did we do before the internet?