This isn't a top quality piece. The decoration is nothing out of the ordinary. It dates to around1890, not 1850. The C scroll rose medallion pattern (like this bowl) was 1st made after 1875. In a no reserve eBay auction, it would finish in the $300 to $475 range for a 15" diameter bowl. A retail price would be 80% to 150% mark up of the auction price, depending on the quality of the other merchandise in the store where it would be sold and what they specialize in selling. A serious collector of 19th century famille rose export porcelain wouldn't give it a second look.