Well I received my pre loved A850 today. Only had about 1/2 to play with it but first impressions are really good. Ive been using the A77 for the past couple of years so will be very interesting to see the differences between the two as this is my first experience of full frame. Love the sound of the shutter and the OVF is great wasn't sure how I would going back to it after using EVF. Looking forward to having a real good go with it.