I was offered a discount below the Minimum Advertised Price (MAP) when I called a Victron dealer with some questions about some Victron gear. If you want a discount you need to talk to a dealer. They are not allowed to advertise prices below MAP but they can sell at whatever price they want.
So, pick up the phone, call and talk to a real human ... create a relationship. They want you to succeed so you buy more stuff from them, and they will be your contact if you have any questions or problems along the way.