I’ve got a K1000 too, same thrift shop, the place is a goldmine for addicts like me!
I am a music producer...and once in a Thrift Shop I got an Audio Technica Studio Condenser Microphone, AND the necessary pre- amp. For $6.00! Then I asked for my “Senior Citizen” Discount and it became $4.50!
When my buddy saw it and found out how much I paid for it, he split his sides laughing. The 10 year old sales slip was still in the box, and ten years ago it retailed for over $300.00!
I LOVE that place!
:-)))