I paid China domestic price of USD180.
I notice it was over USD400 on some platform. You justify that yourself. My view: it was a good pen but not worth that much.

I will update the history later in my blogspot. The history section in this video, I believed is not 100% correct. I found more sources after making this video.

More pictures/ disassembly here:
https://shanghaiknifedude.blogspot.co...