If you're on a thrifty mission, your best bet is this Theory Blazer. It's a wonderful item, while not very expensive. Another wonderful option is this Calvin Klein Blazer. It's a product you'll fall in love with which also won't break the bank. You might also want to consider this Sag Harbor Blazer Jacket. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you can afford to spend a little more, why not look at this Lucky Brand Blazer Jacket. While the price is very reasonable, this product is an easy wardrobe update. Why not also check out this Theory Blazer. It's an attractive option both price and quality-wise.