Selling groundnut is quite lucrative but also challenging. I remember when I used to buy it for my peanuts. It was one of the cheapest ingredients but the business folded up with the rise of cooking oil price and flour.
Even my precious groundnut wasn't left out.
If you can fry tasty groundnuts and identify the good seeds like you mentioned, you'd make profits daily.
You would agree that people can't resist this particular snack.
This business doesn't even need oil, the huge crasher of food businesses. With your salt and gas cooker, 90% of what you need is set.