Maybe he is trying to keep the price down.
I used to buy all the J-3's I wanted for $50 each.
Nikkor 85/2, wide-open on the Df.
Bokeh shot.
I have a lot (defined as > 100) of lenses. Most of these were bought for ~$100, when I see a good lens with perfect glass at that price- tend to grab it. Figure I'm not going to lose any money on it. Unless I give them away.
Lenses that others have raved about that I would not suggest: Nikkor-S 5cm F2 and Nikkor-S 5.8cm F1.4. Both low-production, and early. Optically, the Nikkor-H 50/2 and Nikkor-S 50/1.4, I think are better.
Others- The Nikkor-Q 200/4, the later compact 200/4 is much better. The Nikkor-Q 135/2.8, the newer 135/2.8 compact planar is much better.
Nikkor 28/3.5 and 35/2.8- bought dirt cheap, but don't get much use except as body caps. I also have a lot of Nikon cameras. I was given four Nikon F's in the last couple of years, including two Celestron Modified Mirror-up bodies.
45/2.8 GN-Nikkor, a nice Tessar and small, but optically "okay". But finding one for $10, grabbed it.