Can villagers buy kelp?

Could you please elaborate on the following matter for me? I'm quite curious about the feasibility of villagers purchasing kelp. Given the circumstances and potential constraints they might face, do you think it's a viable option for them? Would they have access to the necessary resources and channels to acquire kelp? Also, would the cost of kelp be within their budget, considering their economic status? Furthermore, are there any legal or regulatory implications they should be aware of before making such a purchase? I'm keen to understand these aspects in detail. Thank you for your time and assistance.