Upright (vertical) freezer... help please

Looking for the best deal/bargain on an upright (vertical) freezer, with:
- R600 refrigerant, or
- at least a three star energy rating (if not R600 refrigerant), and
- a capacity around 300-360 litres.

I’d rather stick to known/good brands if at all possible. I’m feeling a bit overwhelmed by google and the energy ratings comparisons website :(, so I’m hoping that someone else has already done some research for the same thing in recent times that might assist me :)

Thanks all :)