I understand in Thailand they can confiscate Buddha statues in the customs unless you have a special permit that takes days to be processed and a lot of paperwork.
It is clear that from a "wordly point of view" it is not a good idea to buy and take it away without permission but from a Buddhist point of view: Is there anything wrong with it? Of course I'm talking about a person that will use the statue to worship and will not treat it with disrespect. (Not an antique of course, just a regular statue)