The blazer is one of those wardrobe pieces that has all the potential to become your most worn thing. It will become your first-choice jacket for work hours.
If you can’t spend much, this UO Blazer Vest will fit the bill. It's a fail-safe choice, while not very costly. In this price range, you can also look at this Sparkle & Fade Blazer. It's also a popular item and won't break the bank.