I believe he already answered that for you...
So if they're ~#300, you're looking at anywhere from ~ $360-$675 each, depending on quality.
Hard to say without seeing them, but a healthy looking and mostly black 150lb bull calf with or without a white face can be bought for around $2.25/lb here at any livestock auction. Poor looking ones will run lower..$1.20-$1.30/lb
So if they're ~#300, you're looking at anywhere from ~ $360-$675 each, depending on quality.