how much will it cost him to have breast surgery?
This occurs in a lot of boys his age. I would not recommend any kind of surgery on you son at least until the age of 17-18 when all the puberty changes are finished. Some gynecomastia will resolve on its own. Meanwhile, your pediatrician may recommend your son be seen by a pediatric endocrinologist in the interim.
GailToo early to consider surgery for your son! It is highly likely that it will resolve by the time he reaches puberty. Talk to his pediatrician about possible hormonal problems. Also, read the linked article below which I wrote about Gynecomastia as you should find it very helpful! Good Luck