Ten downstate new and used car dealerships, including three on Long Island, are getting notices from State Attorney General Eric T. Schneiderman that he intends to sue them as part of a broad probe into the advertising and marketing of cars and expensive add-ons that can boost prices. Ten downstate new and used car dealerships, including three on Long Island, are getting notices from State Attorney General Eric T. Schneiderman that he intends to sue them as part of a broad probe into the advertising and marketing of cars and expensive add-ons that can boost prices.