How do I make sure a sealed set is not opened and resealed?

bigboy61 · 2016-06-02T01:19:53.000Z

Hi there. Someone on Craigslist is supposedly selling a brand new UCS Tie Fighter for $160. It's not an amazing deal but I think it's pretty solid. He says it's sealed. Is there anyway I can tell if it was ever opened and resealed? I don't want to get defrauded. Thanks in advance!