Sugar glider question?

Its really hard to tell via those pictures, i'd definitely ask for clearer pictures. And when you see them in person, make sure their eyes are glossy but not watery. Make sure there genital areas are clean and not dirty, red, swollen or wet. Check their skin to see if its flaky or red, and if their fur is shiny and soft and not dull and brittle. Also, check their mouth if you can, look for tooth health and mouth color. The person should definitely take them back if you have a problem, and if they wont they i wouldnt obtain them in the first place.