I started out with a low temp holding/slow cook oven that I picked up for 125 bucks. The oven's thermostat would only allow the oven to 265 so work needed to be done. Myself and a buddy got to work and found a used oven for 45 bucks and took the thermostat and elements and some nobs off of it and a few other things and began to convert the low temp oven over to a nice hot oven. Picked up some rivets, wire, BBq temp gauge, cutoff wheel and some other odds and ends.
Theses are the two we started with.
We sized down the original housing on the oven for the dials. Plus added the dials back in.