According to Piano Price Point website,
"Lieder Schwander is a well-known and respected piano brand, and this upright piano may have some value depending on its model, condition, and the local market demand for used pianos. On average, pianos of this brand can reach an asking price of several hundred to a few thousand US Dollars with older models of upright pianos often being valued in the lower part of that range,"
It is advised to get an appraisal from a professional piano technician or consult with local piano dealers about the current market value for Lieders Schwander upright pianos before setting a price.