It's not 'falsely accusing' to say it sounds like a stolen animals situation. It's an opinion.
And as far as "I posted my opinion" routine, everyone who is a member of the site is just as 'entitled' to post their opinions of any/all posts on here. If you post that you think keeping stolen property is a great thing to do, you should be aware that people will feel free to post their opinion of that.
I know that if I were hard up for money, or HAD to get rid of snakes I would definitely contact people I had bought snakes from. After all, I already did one successful deal with them.. why not contact them? If they didn't want any of the snakes, they could easily know someone who did.
I do hope it's a completely legit deal and your buddy got a great deal. Otherwise, he's going to lose out on the money and the snakes, which will suck. If they are stolen, I hope the owner finds out where his animals are so he can get them back.