What did Sonic originally sell?

Can you clarify what you mean by "Sonic"? Assuming you're referring to the popular video game character or franchise, Sonic the Hedgehog, it's important to note that he didn't directly "sell" anything in the traditional sense. However, if we're looking at the broader context of the Sonic franchise, they've been known for selling various merchandise and products throughout the years. For instance, they've released numerous video games featuring Sonic as the main character, as well as toys, clothing, and other collectibles based on the franchise. So, in a sense, the original product that Sonic "sold" was his popularity and appeal as a video game character, which then led to the development and sale of a wide range of Sonic-themed products. Does this answer your question?