For Event Registration, is there a way that a member can enter their member number and then purchase at a specific member rate?
On the Payment Option, there if a field call "Require Membership No". If this is enabled, then a last name or company name for account level members and membership no. will be required to be entered.
The Payment Option is the type of ticket. This is the related record to Payment form, that is related to the Merchant Facility.
To setup and enable this, please see procedure How to set up Membership specific pricing