Hi R. Spencer,
I'd like to add that if you are planning to move within a short timeframe that there may be may other areas to focus on than the fireplace, as Walt previously indicated. We bought our house over ten years ago, knowing that the fireplace needed work (and it still does). There is a chance that your idea of the perfect fix, may not be inline with a new owners ideas, and if you are looking to sell, that wood burner taking up space where the original chimney could have been repaired, may be seen as a negative. In our case, we know that the mortar is failing in our chimney, and if we fix it, it will be safe for wood burning once again. That doesn't happen to be on the top of our fix-it list, so we haven't had a fire there (for over 10 yrs). We have chosen to go the route of more energy efficient windows and adding insulation as priorities. If someone had put a woodburner in our living room with its current layout, it would make it cramped and limit walkways. If you know for certain that the market for a home such as yours, in your area, is almost always wanting a woodburner as the main source of heat, then it might be a worthwhile upgrade. But if many are okay with the option of having a fire (even with having to repair the chimney) then it might not be worth the cost. If you end up buying a stove used, look to evidence of rust/holes, that can be a fire hazard in and of itself. You will need proper backing for the floor and area (normally behind, but could be in front of) the unit to prevent any fire issues. I wish you the best of luck!