When sourcing a silver saxophone, distinguish between silver-plated brass and solid sterling silver (.925). Most commercial 'silver' saxophones are silver-plated, which offers a brighter, more projected tone compared to gold lacquer. Ensure the plating thickness is at least 6 to 10 microns to prevent premature wear. For the body construction, prioritize ribbed construction for better durability and a warmer sound, and verify that the tone holes are level and burr-free to ensure a perfect seal with the pads.