Free real-time odds sites can help with line shopping, but check the details....

https://wiki-square.win/index.php/What_Should_I_Verify_in_the_Bet_Slip_Before_I_Click_Place_Bet%3F

Free real-time odds sites can help with line shopping, but check the details. Compare the same market, like player points or a game spread, across books before choosing a price