Affordable fisheye lens for Nikon D3100?

Looking for a nice cheap FULL FRAME fisheye. I found a nice one for $230 but thats more than i can spend right now.

You will have to wait and save more pennies.

The economy fisheye lenses cost from $230 to $300.

The better fisheye lenses cost closer to $800 to $1, 500, so you are in the right ball park, but your budget is a little low