It's so irritating when a nice coin is damaged but at least it is still worth its bullion value. Selling it would probably be best as it will irritate you every time you look at at, knowing how the damage was caused. But it would be infinitely worse if the coin is a high grade early shilling.
Easily identifiable Tudor coins with readable legends and dates are certainly not junk! They are pieces of history and can be fascinating to beginners.
Doesn't look suspicious to me. If I want to make certain, I would check its weight. Can also see if it is the correct thickness and diameter by comparing with a genuine half sovereign. But I wouldn't want to keep it because of the scratch.