Nice looking baby!! Congrats!
Interesting that, even though the breeder wasn't there, they weren't able to give you any info on the snake. Whomever made the sale should have been able to tell you gender at the very least. You shouldn't have had to think to ask....
Well, it's still a nice baby. As far as age, it's hard to tell based on pictures alone. Most likely it is a 2013 (so anywhere from 3-9 months old depending on when the litter was born). And it certainly is no older than a 2012.