New Owner Operator - Bulk Trucking Forum & Discussion Board & Bulkloads.com

I'm new to Bulkloads.com. My question when one choose a load and if the price is posted or not posted do you usally try to get a better rate when you call in or email direct to the broker?
What I have been looking at seems to be pretty low rates. So I'm wondering if you can ever get more or it is what it is?

Thank you,
Joe