The value of a Leblanc Symphony 3 clarinet can vary depending on several factors, including the condition of the instrument, its age, and the specific model.
Generally, used Leblanc Symphony 3 clarinets in good condition can range in price from around $1,000 to $2,000.
Newer models or those in exceptional condition may command higher prices.
It is always recommended to consult with experts or reputable musical instrument dealers to get a precise valuation of a specific clarinet, as the value may fluctuate based on various market conditions and individual preferences.