If you'd rather not spend much, your best bet is this Blazer. It's a wonderful product, while not very expensive. In this price range, you can also consider this Topshop Jacket. It's an item you'll fall in love with which also doesn't cost too much. Or you can choose this Caslon Blazer - be sure you'll be making a stylish addition to your wardrobe.
If you want to splurge on a luxury piece, then you absolutely must check out this Stella McCartney Blazer. This item seems costly, but it's worth it.