car information service

Does a automechanic (not a dealership) typically supplement 10% or so to a cost of a partial (timing belts, H2O pumps, etc.) or do they only assign what they paid for it? we was only wondering if it’s cheaper to stop during O’Reilly Auto Parts, or a like, as well as collect up a partial as well as give it to a automechanic to implement it.

This is really prevalent automobile model, not a singular car.