This is a common thing your mechanic will say when fixing your car will be extremely expensive. They aren't joking and when they actually use the phrase, "It's gonna run ya" it's probably gonna run ya somewhere in the neighborhood of a thousand dollars.
If you brought your car in because it wouldn't start, It could definitely be your Starter or your Alternator. It might not be, but it certainly could be and it almost always is. 90% of the time that something is wrong with your car starting, it's your Starter or your Alternator. If it's not that, then it's probably your battery and if that's not the problem, then there isn't gas in the car and you're an idiot.
Since it's your mechanic's sole job to determine what the problem is, this is a bold move as a mechanic. This isn't some clever ruse, he definitely doesn't know what the problem is and you should consider taking your car somewhere else.
6. "I Can't Guarantee This Is Going To Fix The Problem"
Your mechanic wants to fix the problem with your car, but sometimes they end up just fixing something else that needs to be fixed and the original problem persists. This is usually the direct result of them not being exactly sure what the problem was. Ask them to check your Alternator.
Your mechanic is currently working on 14 other cars right now, so yours makes number 15 and that's probably when he's going to get to it. He's not trying to be a dick, but he knows he can tell you this with confidence and you aren't going to take your car anywhere else because frankly, you can't, it's not running. Keep in mind that when he does get around to diagnosing the problem, he'll probably have to wait for some parts.
This is the nicest way for your mechanic to tell you that you're driving a rolling pile of junk and that the necessary repairs will be considerably more expensive than you were expecting. In other words, it's gonna run ya.
11. "When I Get Home After a Long Day at The Shop I Just Feel Ugly."
This news is most certainly bad for you and your mechanic will tell you this in all honesty, but while also attempting to hold back a smile, because unfortunately, the worse it is for you and your car, the better it is for your mechanic. If the news is really bad then it's gonna be a while til they can get to it, because they're gonna have to wait for parts, they won't be able to guarantee the work is going to fix the problem and it's definitely gonna run ya, but they'll call you when it's ready.