Neither one is automatically a deal breaker, but they're very different problems. Termites usually don't kill a deal unless the damage has reached the actual structure of the home, which is uncommon. The typical fix is tenting the property, if it hasn't been tented in the last decade or so, and repairing the affected woodwork to get a termite clearance. That's a known, manageable process. Mold deserves more caution. Minor mold in a poorly ventilated shower or on a ceiling is generally cleanable and no structural concern. Mold from long-term water intrusion inside a wall is a different problem entirely, especially black mold or another dangerous type. We had a client's purchase where you could smell mildew throughout the house and every tested area came back with mold levels that were out of control. That's a red flag worth walking away from, given the potential health harm and the cost of truly remediating it. So get both properly tested and scoped. A single, isolated, easily fixed spot is manageable. Widespread mold from water intrusion is a serious problem. And anyone with mold allergies or health sensitivities should weigh it more heavily than the purely financial math would suggest.