Finding the right bottle of?Napa Valley?Cabernet Sauvignon?is tough for anyone who wants to stay within a modest budget. The prices can seem out of reach to anybody who isn?t a vested entrepreneur. Part of the reason for that reality is the cost of the region?s grapes is notoriously high:?$7,421/ton?on average just last year, as opposed to $2,209/ton in Mendocino County.