Sounds like a very stressful, sticky situation. I think I would be inclined to still talk to an agent. If they listed it at 142,000 then the agent must think that is a fair price based on a current market analysis. Who knows where that 126,000 came from...what is a zillow estimate? It costs nothing to consult an agent. And tax valuation can vary greatly from sale valuation. I sure hope you can come to a decision that works well for you. This certainly is a stressful time.