I find I save at least 25% even with the cost of shipping, and don't have to get in my car. Always arrives on the day the say, and fifth on time. I can't say 100% better then the parts store a mile away, but I can say 80% better! It's faster even if the part store down the block has to order my part. About 5 to days faster with Rock Auto. I tell everyone to get there parts from Rock Auto, and always have the right part. Almost sound like a commercial, but it's true...