To comply with GDPR we will not store any personally identifiable information from you. Therefore we will serve sub-optimal experience where some features such as Login/Signup are disabled. However, you will be able to search and see all the properties, see agent contact details and contact them offline on your own.
Commission payable is computed from the selling or purchased price. GST is a government requirement. However, as to how much is the commission payable, it's to be discussed between the salesperson and the client.