Linda,
Your current consignment percentages are very typical and if that formula works for you and the retailer, then I would suggest not reducing your price.
Some negotiating points to consider – let the retailer interested in purchasing inventory know that your product being consistently priced from one location to another is critical for you and for them.
Another factor in a consignment environment, is an agreement that the retailer is carrying insurance on the products that are still under your ownership. How are you handling insurance now?
Judy