Example of the crocked shop I worked at years ago.
Old couple goes to dealer for rattling noise in front right fender area when compressor is running. Dealer tells old couple it will be 1500 bucks and you need a new compressor. Old couple gets wise and buys part and declines having the dealer do the work. Old couple comes to our shop and says "put this on, my compressor is bad and its making a rattling noise".
Job comes to me (my very first Mark 8 job EVER!) and I start pulling the fender liner off. Not knowing anything about the air ride I notice the compressor is bolted onto the bracket at four spots and only one bolt has a rubber grommet on it. I move the compressor with my hand and notice the bracket is banging onto the bolts causing a rattle. What a perfect time to make a life time customer......
Soo....I talk to the shop foreman and say, "this thing is working fine, the grommets are bad!" He says, "oh well, they already bought the part." So, instead of saving the customer probably 1100 bucks by installing new 10 dollar grommets, I was told to install the new compressor they bought.
Needless to say, that job was the icing on the cake. Shortly after, the shop foreman started spending his time looking at kiddy porn (proven fact) instead of upselling my jobs. I quit. About two months later, the shop got closed down by the BAR.
Thats how Lincoln Transmission got started, my friends that worked there with my opened up their own shop.