Stephen,
First of all, thank you for the beautiful photos.
That is one beautiful "K". It would command a premium for three reasons. 1) it has a Gus Szamboti forearm, as evidenced by the appearance and original date of purchase and 2) the incredible condition and 3) you are the original owner.
The K was Palmer's answer to Paradise's Diamond King, which could only be produced in limited supply. The K was tricky to make. Thsi cue is a collectors dream and would command top price anywhere, any time. The Szamboti forearm is a biggie but the condition is spectacular. Congrats - that a great cue you have there.
all the best,
Chris
The Palmer Collector