If you're a frugal shopper, your best bet is this Asos Sport Coat. It's a great product, while not very pricey. In this price range, you can also check out this Blazer. It's also a popular item and won't break the bank. Or you can opt for this Asos Blazer. This item has all the potential to become a powerful player in your wardrobe.
If you're looking for something in between pricewise, take a look at this Hugo Boss Coat. While the price is very reasonable, this item is an easy wardrobe update. It's also worth checking out this Ted Baker Suit Jacket. This product is extremely popular and, just as importantly, not very expensive.