If I understand right your question ...

1.  Create your storable product
2. Create X storable products which will consume the one of the first step
3. Open the Manufacturing module, and go to Products -> Bill of materials
4. Create as many BOM as you created products at step 2 and specify it consumes X quantity of the storable product created at step 1

You're done, you can manage price of each different BOM without having any impact on the first one which "manages the stock"