If you're after a thrifty option, this J.Crew Dress Shirt will fit the bill. It's a foolproof choice, while not very expensive. Another strong contender for your wardrobe is this KIOMI Oxford Shirt. While the price of this piece is competitive, it will certainly attract a lot of attention. Or you can choose this Asos Classic Shirt - be sure you'll be making a stylish addition to your wardrobe.
If you're looking for an item in the middle of the price range, look at this ESTNATION Oxford Shirt. While the price is very reasonable, this item is an easy wardrobe update.