I'm pretty sure this little guy is male, but not so sure on the age... maybe five years old? He's only about four inches long (last picture for reference).
Also, based on these pictures, would you say he looks pretty healthy? I am worried that he is pyramiding a little, but I just got him and am regulating his diet because he is a little pig sometimes
Judging from the condition of the shell I'd guess he's older than five. Because of the glitch in the program with pictures, I'm not able to see any pictures other than the one showing the plastron.