Get Windows 8 Pro on your current PC for an amazing price.
놀라운 가격으로 지금 여러분의 PC에 Windows 8 Pro를 설치하세요.
The noun ending 가격으로 (amazing price) doesn’t fit in context since it is taken as a means to install Windows 8 Pro 놀라운 가격으로 설치하세요). The structure modifier + object + verb makes the sentence awkward in this case. The beginning part, 놀라운 가격 (an amazing price) was supposed to modify the product name ‘Windows 8 Pro.’