Generally, Buescher clarinets from the 1940s can range in value from around $500 to $1,500, with some rare and well-preserved models potentially fetching higher prices. However, this is just a rough estimate, and the actual value may vary depending on several factors.
To obtain a more accurate valuation, it is advisable to consult with a musical instrument expert or appraiser who can assess the clarinet's condition, model, and market demand to provide a more precise estimate of its value.