Conversions are major modifications to the aircraft that usually increase the value. Conversions often involve an upgrade to the engine(s) and avionics, and are typically given their own nomenclature. For example, the Airbus AS-350B2 may be converted to an AS-350FX2 or AS-350SD2. To find the value, the original manufacturer model nomenclature is selected, then choose the appropriate conversion from the drop-down menu. Using the previous example; select Airbus, AS-350B2, click on the conversion, then select the engine installed. This will populate the resale chart with the pricing specific to that model and conversion.