Why is the Nikkor 35mm f/1.4 Way more expensive than the Nikkor 35mm f/1.8?

Also, the 50mm 1.4 is considerably cheaper than the 35mm 1.4 as well. Can someone please explain why? They both seem to have similar features, but I'm unsure why the prices vary so much. I'm looking into purchasing a new prime lens for my d60 as I've been shooting with my kit lens.It'll be used for everyday use so I can document my life and experiment, explore and expand with my photography skills, so any help with that is appreciated! Thanks!

Added (1). ALSO, I'm not very familiar with 3rd party lenses but I've been looking somewhat into brands like Sigma and Tamron, if you're familiar with prime lenses from them that have better value let me know!

Bigger glass optics in the lenses with smaller aperture.

One major factor here about the 2 lens that you are mentioning is the one 35 1.8 is a DX lens (for the smaller sensor 1.6x frame cameras like the D3100, D3000, D7000, D90, D5000, D5100)

and the other one 35 1.4 is an FX lens (for the larger sensor, full frame cameras Like the D3, D700)

Usually the lower end cameras have the smaller sensor chip and will make a full frame lens focal length longer so a 35mm lens will become a 50mm depending on the sensor size. Be aware with Nikon not all of the small chip camera are low end as they mostly only add full chips on the D3 and D700 line anyway.

So if you don't have a FX camera the 35 1.4 FX lens will not be useful to you unless you plan to get a FX body in the future.

This FX lens happens to be better glass and better made, the body look waterproof for professional use. And the Key factor here is the 1.4 opening to be able to shoot in very low light conditions and the lens is wide angle it will not effect depth of field so much.

All in all this all depends on your camera type at this point if you have a DX camera you need the DX lens for it to be a true 35mm same with the 50mm you would need one that matches your camera type. Also you mentioned the 50mm is cheaper. Well it is a different focal length and has less glass in the lens body. The glass in these lens are all polished to a very high standard with makes the cost high.

I'm a professional photographer. I never put Tamron or Sigma lenses on my cameras it maybe a personal preference but I can see a huge difference when compared side by side