Looks to be, Carinotetraodon Irrubesco.
not rare, but you got it cheap. They make interesting little pets. Not too hard to care for either.
oh wait theres a problem. The puffer i have, his eye isnt red
I see them pop up in the US, but I'm having a hard time finding them over here. Last time I saw them for sale was about 3yrs ago, going for around $10.
I don't know what else it could be with those markings and body shape. Hopefully the red eyes will develop.