If you can’t spend much, your best bet is this Kasper Blazer. It's a great piece, while not very expensive. Another nice option is this GB Blazer Jacket. While the price is rather reasonable, be sure that this piece will become a great addition to your wardrobe. Or you can opt for this Takara Jacket. This item has all the potential to become a powerful player in your wardrobe.
If you're looking for a happy medium, consider buying this Antonio Melani Blazer. While the price is very reasonable, this piece is an easy wardrobe update.