Before answering your concerns about the cost of aggregated Mpesa Line, let me give a heads up about the meaning of these terms. Aggregated Mpesa line means that you will be getting your commission directly from Mpesa (Safaricom) to your Mpesa Line without the agent. Aggregated Mpesa Line was introduced after Safaricom realized the super-agents were inconveniencing and fraudulently deducting commissions from agents.
Read More about 3 Differences Between Aggregated & Non-Aggregated Mpesa Line
Depending on the super-agent or how you acquire the aggregated Mpesa Line, you might pay Kshs 10,000-15,000 to buy the line. However, some super-agents have strict rules and guidelines. They might ask you to have a float of a minimum of Kshs 50,000 before you start transacting using the Mpesa Line. Some of them do not care about the minimum float but they will want to see you making transactions without inactivity.