He is amazing! Thank you for adopting him. I have a Sully who is only 4. (I am 60). So I am hoping that my grandchildren will be in a situation to love him/her well or failing that someone like your family.
I wouldn't dare guess age but definitely someone should. This is a great forum!
Welcome! You will love this forum. I have a young Sully but was given terrible information when I purchased him/her as a hatchling 4 years ago. I made a lot of mistakes which the folks here have helped me to correct.