You don’t seem to be able to custom order a MS or MX, the only option is new inventory for those, Model Y is an option and inventory is probably sensible as you need to take delivery this year. You don’t get any other benefits so no referral discount and I presume no discounts, not sure about cheap finance. There seems to be zero offers on the M3, no referral benefits, no transfer of supercharging, no cheap credit etc regardless, but that’s understandable for a new model. It will be interesting to see when that changes