Like we said, we are specialists to find Driveline Motor quality used engines. We have a huge selection of engine suppliers in our networks and we have an excellent system for quality control and accountability. In enough time it takes 
a mechanic to call up two or three of his buddies, we are able to get you estimates on multiple engines from dozens of suppliers and manufacturers. After we get you a great engine at a great price, we can ship it straight to your mechanic’s garage by freight. It’s a win-win situation-you obtain a better price on a much better engine and the mechanic doesn’t have to waste his period playing telephone tag with junkyards. But of course, you can call us directly and save a lot more money.
Either way, you’re going to pay a huge sum on a brand new car or dispose of money upon the markup on a used engine that originates from who knows where.
Alternately, your mechanic may provide to discover a used engine to put in your car. Again, you will have a big markup on the price of this part-and you might or may not have any say in where he gets the engine from and also less knowledge regarding the quality of the engine and the reputation of the car recycler or junkyard that sourced the engine. Many mechanics have got relationships with one or two car yards where they get their parts and the do little comparison shopping in your stead, which is understandable-they’d rather be in the garage than on the telephone all day.
Another option that your mechanic might recommend is an in-house engine. If indeed they offer a good price and so are a dedicated engine shop, this might be a good option. But in our encounter, we’ve discovered that only a handful of shops that do engines genuinely have what it takes to do a quality job.
Generally, they’ll source it to some other repair shop. So when that happens, you’ll be charged a significant markup, not to mention the hassle of experiencing to undergo two parties in order to get status improvements and estimates on your repair.