The best way to buy a big bunch of QUIPU is to compare rates between different options. You can start by checking the rates on QuipuSwap with any random wallet, and then compare them to the rates on a Temple router. Temple routers have 0% fees, so you may be able to get a better rate. Additionally, if you split your transaction into several purchases, you may be able to get a more fair price. By comparing rates and splitting your transaction, you can ensure that you get the best deal when buying a big bunch of QUIPU.