Free real-time odds comparison sites help with line shopping. Compare the same...

https://wiki-coast.win/index.php/VegasInsider_Odds_Board:_How_to_Read_the_Opening_Line_and_Consensus

Free real-time odds comparison sites help with line shopping. Compare the same market across books, such as a spread or total, then verify sportsbook, selection, odds, and stake on your bet slip