Good afternoon, and really, tell me if the weight ...

Good afternoon, and really, tell me if the weight of the product is 47 kg, and it costs on OLX - OLX Delivery is an option (and there you can choose a maximum of 30 kg when placing an ad). What are the pitfalls and how to properly arrange / send goods with such weight in this situation? (for clarity, the product is an encyclopedia in several volumes, heavy, yes).