The problem
Your dealer agreement forces you to advertise MAP while competitors quietly sell for less. Listing your real price breaks the agreement; listing MAP loses the sale.
The fix
Show MAP on the product page and let checkout charge your actual price. The real price lives in a variant metafield, out of reach of the customer's browser, and a Switchboard rule reprices the line at checkout.
What to know
Signed-price repricing requires the store to be on Shopify Plus (Shopify gates the underlying operation). Prices convert safely across currencies, and when a conversion can't be verified the rule skips the line rather than guessing.
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