If he has a good temperment and is eating well and in good health then I say go for it! Some of the advantages to getting a baby is that you can work with them to calm them down to be able to handle them as adults and you know their life history. But you said this guy was well behaved. Do they know how old he is? There is nothing wrong with giving this guy a good home

. Good luck.
P.S. I am sure that he won't be your last, so your next one can be a baby!!