Lol. Tell me where I can get a new transmission for $1000.
What a shop pays for parts is vastly different then what the customer pays.
My good friend owns a shop, so he has accounts with vendors. Here is a clear example. A set of Kooks long tube headers and catted y pipe from your favorite online vendor is about $2500 then tax and shipping. My buddies cost as a shop was only 1225 through his vendor.......less then half price.
Dealer are in a remove and replace business. More money to be made that way. Once the techs have the process done, they beat book time Everytime and that also means the service department makes more money