I've had this game for a couple of years now. Although I have played many games before and since, this is still easily one of the BEST games I have ever invested in. It's great fun, challenging and thoroughly addictive. Although I bought it for myself, my kids have been obsessed by it too. It is probably one of the very best value-for-money games available; the main game itself will keep you going for ages but there are also loads of fantastic mini-games for 1-4 players.
So, if you're thinking about buying New SMB, please just do it - and don't wait until it 'comes down in price' because it never does... it's so good, it doesn't NEED to be reduced or given away. And you do get a lot of 'game' for the money.
Whatever you pay, you simply WON'T regret it, not even for one second. So just buy it!