Nikon 35mm f/1.8 Lens Repair- estimate?

If the lens costs $200, and it'll cost at least $130 to fix, you ought to just get another one; that way, you're won't run the chance of there being any lingering issues with the lens down the road, after repairs. To me, that would be worth $70. And the lesson you should take from this is, be careful. Plastic lenses break.