Help. What ultra wide lens is best?

I’m a noob (kinda) photographer with a Nikon D3500 and looking to buy a used ultra wide lens.

I thought I had decided, and even paid for a Tokina 11-16mm until I took it back and apologized for being so indecisive. I realized that I think I want an even wider, for example the Sigma 10-20mm, plus there’s a lot of people selling it for 100-150 dollars or even less! But again, I’ve heard it’s not the sharpest at wide angles (and heard the Tokina is very sharp) which made me question it again.

I’m planning on using the lens for mainly street photography scenes and nature and my budget is preferably under 300 dollars used but I can go higher.

I’d really appreciate any help and recommendations, thanks.