- Grape prices drive vineyard land prices, and wine prices tend to correlate with grape prices based on a "rule of 100" whereby grape price equals retail bottle price times 100. - Recent winners have been grapes for wines under $20 per bottle from regions like Lodi, Central Coast, Lake and Mendocino. Losers have been grapes for wines over $20 from Napa and Sonoma. - Vineyard land prices continue rising in prime regions like Napa despite a lifestyle buyer slowdown, as wineries, investors and growers purchase land. The annual appreciation rate in the Central Valley has risen from 2.8% in 2002 to over 17% in 2012.