Thinking of buying a truck. Any good financing companies?

So I got a lead on a local agricultural account hauling chickens that seems pretty consistent and I was scrolling through FB market place and I found a few mid 80’s to mid 90’s trucks for $15k ish that seemed in decent shape. I haven’t filed any business licenses or put any money into this yet I’m just considering it. If on the off chance I decide to try this, does anyone know of any good financing companies? I have good credit 700+.