Hi mate the autos are definitely cheaper and very good boxes, check the gearbox you should go on a good hard run and make sure the box is changing gear properly when pulling of also make sure you test driving it in all modes, manual and overdrive off, the turbos make loads of noise so dont get too scared just look out for smoke when flooring it and smooth pulling.
the cars are amazing and very nice to drive i find obviously depending on what size wheels you have etc, the car is known for being extremely reliable if looked after, and people love them.
i was looking at that car before looks very nice but has been advertised for some time.