weird this stove appears to have locking/clamping doors (id be interested in seeing the inside of those doors?), the condition cant be judged without seeing the internals (grate, liner, flu exit... those area's that are "key" which take the damage), the exterior will generally always appear mint with some new paint. I bet that Nickel will polish up nice however! (does it have a finial on top??? some of these alone are worth $100-$200). I think if it has a finial and base and if a person merely used a general average as a baseline the stove is worth around $500 as it sits... if its been rebuilt in its life already and has a nice grate & liner functioning properly with its shaker, etc. it could be worth up to $1k. (this gives you the range I believe you would fall under with the info available).
hope that helps and welcome to the forum!