It's worth researching if it's a Winsch card - some sell in the hundreds of dollars. These four Winsch Halloween cards sold for $433 on eBay in 2011.

By the way, an estimated 85% of the world's high-quality embossed postcards were printed in Germany 1908-1914, regardless of the location of the image. World War I cut off that source and ended that business permanently; the end of the War was the beginning of the "white border" postcards, of distinctly lower quality.