Usually resistors don’t have to be replaced. But some very old resistors will change in value over time to the point where the circuitry won’t work correctly or not work at all. Some are so old that they might get so brittle that they fall apart when replacing the required capacitors that they are connected to. If these are 1/4 to 1/2 watt types, I will include up to 5 of them if they are off value or they fall apart from age. If there are more there maybe be an extra charge. I have a lot of vintage 1/2 watt resistors.