Where to sale bred heifers?

I have a group of 30 black angus heifers that I am going to A.I. in December. Where is the best place to sell a group of this size? I dont think superior will sell a group of 30 since its not a truck load, didn't know what my other options are. (quả óc chó)
These are nice fancy heifers never been off the farm that will fit in anyone's program.