Mid-70's King 3B with the F-attachment for sale. Great condition overall: silver plating is 100%, just a few small dents and surface scratches, fast & quiet valve action with excellent compression, all tuning slides move freely, no plating wear on the inner slide tubes. Original hard case included (no keys) and a small shank Bach 6 1/2 mouthpiece too. Handslide action is excellent, but not completely silent (I'll give it another swabbing tonight to make it better).
Just to be clear, this is a silver-plated King 3BF NOT a Silver Sonic.
It's for sale locally. I'm offering on the forum for $900 with shipping to the USA included.