Important Notice to Our Customers. One of our biggest competitive advantages, and the main reason why we are able to fix your car for a lot less than our competitors, is the fact that we purchase parts in bulk and stock them in our own parts warehouse. Most of our competitors carry no inventory at all and pass on their higher parts costs to you. The simple fact is this ... our buying power is unmatchable. Remember, at Calvert's Express, you always receive top quality parts and service at the lowest price possible.