This will give Lucas/Riverwood shop around a little less then double more items some of which he did not sell, which a general store in Skyrim would need.
Also side note: For the images on this mod, I was level 1, at higher levels he would have even more variety!
The higher your level the more things he will sell as well as better items. He will sell basically what everyone else will but slightly more quantity.
This mod is also very heavily balanced with no intent to ruin immersion. (ALL ITEMS FROM BASE GAME)