Sometimes the lens is so cheap, and in such nice condition, that you can't say no even though you don't really want it. Such was the case for this Nikkor-H 28mm. An old non-Ai Auto lens, from the early 1970's, it won't work on my D750, and I own several other, better or at least more useful 28mm lenses already.
The case for: the awesome vintage Nikkor scalloped focus and aperture rings, with the colored aperture markers. Extremely compact size and great handling. The case against: doesn't work on most FX bodies, and it's not simply sharp enough to keep up with modern high pixel density DX sensors. 5-blade aperture means nasty bokeh unless wide open, and it isn't nice even then. Also, it's only F3.5.
Verdict: the looks are better than the results.