It is always disappointing to me when a buyer or seller is surprised by situations that do not occur commonly but when they do, folks become unhappy.
In many cases a real estate professional will ask a buyer what types and condition of properties in which they have interest. How about bank owned or short sales or auction or for sale by owner? In some cases, where local profession regulation allow, a real estate broker will enter a listing with a $1 compensation with the intent such terms would be negotiated or in the case of the buyers agent who is asleep at the wheel. will in essence work for nothing. There are many creative, perhaps deceptive methods to transfer costs to the buyer or the buyers agent.
Knowing this is a real situation, your agent should present you with several choices that may have been discussed at the very start of your home search activity:
1. Don't show me any homes where the seller does not pay all agent fees.
2. Show me homes that are within 1% of your agent fees with you picking up the balance.
3. Show me everything and I'll chose on a house by house basis.
Sam, I do hope you found the skill, knowledge and effort of your real estate agent to be worth the 1/2 percent.