Which lens to keep?

I have a Canon 35mm f2 and a Tokina 17mm and can't decide which to keep. Both lenses are sharp and the Tokina gives me a focal length I don't have, although ultra wide doesn't seem to appeal to me that much but that maybe due to no experience with one. I know that the Tokina will bring around $100 more than the 35mm will so that makes a difference.
I don't know which to keep so maybe I will sell both since neither will be used much due to my 24-105mm.
Any thoughts?

sell the tokina. if you find yourself missing UWA, you can always rebuy it later on (been there, done that).

it's nice to have a faster prime in your bag, especially if your normal zoom is f4.