In Texas, commission is very standardized and only varies in extreme cases or in cases where the agent and the buyer have a long-term relationship. 99 times out of 100 in Texas, the commission is 6% of the sale price -- half of that usually goes to the real estate agent and the other half to the broker (the agent's sponsor).
Brosen is right in that the fee/commission is spelled out in the listing agreement, but I'm not familiar with the 1% custom... Seems pretty low.
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