I've been looking for a pair of male rats, and in the process I stumbled across a flood of really depressing and rat craigslist ads. One of them was an add for a tame, frequently handled black male rat. Perfect except for one thing; he's been kept alone since they got him and he's a year old. Should I even look into this at all? What issues could I come across? What's the likelyhood of him ever being able to live with other males? I feel bad for him, and he seems like a good rat that deserves a good home.