In an action for a balance claimed to be due for selling a large tract of land for defendant, where the issue is whether defendant agreed to pay plaintiff the sum of twenty-five cents per acre and a commission of five per cent, on the balance, the testimony of a real estate agent is competent to show that the compensation claimed by plaintiff is reasonable and not unusual. Greer v. Laws, 56 Ark. 37, 18 S. W. 1038.