If you just "grab one before it goes to assembly line" this will likely have a huge impact on the assembly line. Factories put a lot of effort into managing inventory of material. Lead times on parts can often be in the months if not years. If there are unexpected shortages of parts and subassemblies, the hourly or daily costs of a line down can be enormous. Shipping one of something to an end consumer is usually a completely different supply chain than shipping containers full of finished goods to distribution centers which then go to retail. Taxes, tariffs, shipping methods, etc are all completely different. You can't just commingle things like this easily.