To me "high end" implies something at the expensive end of the market, and it also implies good quality, whether that quality is actual or perceived, is variable from product to product.
About 10 years ago, I was in the market for some new stereo gear, I had my heart set on a "high end " European brand that I always considered one of the best.
The store owner actaully talked me out of buying that brand and sold me the equivelent bits made by Yamaha at about half the price because in his experience the Yamaha gear was better quality.
I was a little dissapointed at first because I didnt get my "high end " stereo, but 10 years on, the Yamaha is still thumping out the tunes, would the other one be still performing ? I dont know, but I spent what I saved on CD's and doubled my music library.
Back to pens, if I was to take a gold nugget shaped like a dogs turd, drilled it out to take a refill, and glued some diamonds on the side, would anybody consider this pen to be " high end " ? I certainly wouldnt.