Best price: Millwall pay $1.78, Derby County pay $5.20, a draw pays $3.95 (the best of 45 bookies we checked). $100 on Millwall returns $178.
Fair chance (our read of the prices, with the bookies' cut taken out): Millwall about 5 in 10, a draw about 2 in 10, Derby County about 2 in 10.
How much the bookies keep: about $7.16 of every $100 bet on this game.
Since betting opened: the price has barely moved.