Hello, everyone. Coming from a Nikon D600, I'll finally be buying a Sony A7 this weekend - a used one. Since I'll be doing the business in hand with the seller, I was wondering if you could give me some tips of things to look out for when doing some tests. (I'm not talking about the general stuff, but more things specific to the A7 - maybe some common issues that these cameras may have, etc.). As a side note, the camera still has 1 year of warranty, so I can always send the camera to Sony to correct any particular issue. Hoping to hear some experienced opinions. Thank you in advance.