Different rents quoted for same apartment

Hi there, A broker showed me a few rental places today, one of which I really liked. I started searching for some pictures online to send to my husband, when I found that other brokers were quoting a different rent for the exact same apartment (about $100 cheaper). Also, one broker is not charging a fee. What is the etiquette here? The broker I went around with today was nice enough, but I don't want to feel like I'm being taken advantage of. Is it possible that some brokers absorb the fee paid by tenants? The original deal I got was 1/2 month's rent (the building pays the other half). Would love to hear your thoughts.