Camera advice please.

I use a ‘bridge’ camera for my ‘visual diary’ and it is perfect for the task.

However, in my working life I am from regularly asked to take pictures of agricultural machinery for use in ads, brochures and exhibition panels.

I am conscious that a camera with a larger sensor would make… sense

So here’s the parameters

A full size sensor
A modestly wide angle lens
Second hand
Cheap
All the shots will be taken from a tripod, outdoors, daylight

What should I be looking at?

Moggy