I think with removable you price to absorb the shipping is quite hard to look competitive when you do not line item.
Think of it this way you have 4 appointments for a simple full denture, the case is heavy and requires a bigger than average box is you mount on simple articulators. It will cost you at least 100 for the 8 trips this case must take. This price is with a good Discount with ups or using the flat rate with the post office.