Exclusive Buyer Representation

[Ben H.]

I have bought/sold a number of properties in North Carolina but it has been a few years. Currently working on an offer to purchase some farm land for a future personal home build. Listing agent passed me over to another agent in same firm for me to work with as my buyer’s agent. My buyer’s agent is asking me to sign an “Exclusive Buyer Agency Agreement” that states I’ll only use her for real estate deals for the next 12 months and I as a buyer guarantee the firm a 6% commission. 

I don’t remember signing this in previous deals (but I could be wrong). Is this normal/legit?