Free odds sites help you line shop by showing prices from books in one place....

https://ace-wiki.win/index.php/What_Should_I_Check_Before_Signing_Up_for_a_Premium_Odds_Tool%3F

Free odds sites help you line shop by showing prices from books in one place. Compare the same market, like a spread or total, then check the odds and pick on your bet slip. Check the game, player, and line, too, as similar markets can differ.