<human>: Can you condense the text into a few key points?

My 2008 Mazda Tribute has a weird problem. It made a grinding noise. A local shop told me it could be something to do with the ABS. I could be driving and it would make this awful noise. When I went to brake the brakes would be jerky. I also recorded the sound just in case. 
The sound comes randomly. I never know when it will start doing it.

I browsed Craigslist and found a guy that said that he has 10 years of mechanics. I know mobile mechanics charge less than the shops. I wanted to save money and help out my fellow man instead of paying a shop. Big mistake. I give him a call describe my vehicle and the problem I'm having. He tells me "oh yeah I know what it is. 

He comes to my house. He tells me "let's go for a ride". Also tells me "a good mechanic first test the vehicle". He kept braking hard. I keep telling him that you don't need to brake hard for it to appear. Doesn't listen to me. 

I asked for a second opinion on my struts and shocks.Since a automotive chain quoted me $1,200 to fix it. He Recommended that I replace it too. Told me he would do both for $300. Just that I get the parts for him. He said my ride is too bouncy. He also said my brakes are sensitive and also my steering. My steering is fully electronic so nothing I can do about that. Kept still braking hard and steering like a madman. 

He suggested that I take care of the struts and shocks BEFORE I fix that abs grinding noise. He lost my trust when he said that. 

He tells me he got his car mechanics training at Jobcorps. Yeah another mistake. 

I paid him $45 by the way for the whole ordeal. He told me to come to his shop tomorrow to spend more time with it. Uh, no thanks. I'll go to car shop instead.
<bot>: I paid a mobile "mechanic" to come to my house. Did a car test drive with me. Really didn't know what was wrong and went in his way home.