Having done cast work like that myself it is not that hard nor is it overly expensive. If this piece has been mass produced in a shop in eastern Europe it would be even cheaper. The actual original would have been made out of clay, wood, stone. The moulds would be made and then the zink cross / eagle would have been poured one after the other they could have been pumped out. Zinc is not expensive, it can be obtained through junk yards and through metal theft. if its a fake the production cost and the material would be quite low. The only part that would take time would have been the original design but artists in eastern European and asian countries often get little or nothing for this type of work.
If perhaps its original the process would have been the same however it would only hold value due to its historical value, not because of its complexity, design or the material it's made out of.
It may also have contemporary origins as the swastika is not often seen in public Germany due to legal issues, this would be a way to get around that policy with some groups. It may have been purchased for a club house, bar, event or service.