The biggest problem that I see in the repair field is that most of the customers are to eager to take the word of the repairman. I hear of stories of people paying up to $300 to get a early American mantel clock repaired, stories of clocks needing more bushings replaced in the movement than there is places to put them. Most repairs will require the clock to be cleaned, oiled and some minor adjustments made to the movement. There are some cases that the movement will require "Bushings" to be replaced. This is caused by a movement that has been run well past the recommended servicing schedule. Once the oil on the pivots has been run to long it tends to gum up and loose its lubricating properties. Once this happens the steel pivot that is running in a brass or sometimes bronze bushing will start to wear from the force of the gear train trying to force each other apart. Then the pivot will start to cut a grove into the plate of the movement causing the movement to loose power and in other instances the gears can loose contact with each other causing the movement to release all of the stored power in the main spring. This is a BAD thing that leads to bent gears, stripped teeth and broken pivots and pinions. Don't get your clock cleaned, Just the clock on your mantel.