Unfortunately(?), I don't have many 'before' photos, but here are a few I've come across.
This is pretty possibly my least favourite photo ever, and it's one of the only ones I have that I know was actually taken at my highest weight: 257 lbs. I was so shocked when I saw this photo.
It's from about October, 2008. 257 lbs.
Below are a few others. I'm a little fuzzy on what weights I was each of them, but I guess it doesn't really matter. The point is: I was big.
I only started taking progress photos after a couple of months, but here they are.
In these pictures I'm 241 (16 lbs lost), 227 (30 lbs lost), and 215 (42 lbs lost).
Same weights, side views:
And here is a current and more candid photo, for reference.