If you really want a wife, save your 2.5BTC and get a real one the traditional way. Go out and meet people, create relationships and friendships. You may eventually end up with a wife. Then I can tell you right now - the 'free' one will cost you MORE than that 2.5BTC in the long run haha.
And in this way, you will get to know each other. If you will just buy your wife with that amount, it can make your whole life worst. It's hard to be with her if you just met a while ago and bought her online. You will be included to some strange couples record. For sure if someone will buy a wife with that amount, he will regret in the end.