Who rebuilds 727's?

It always bewilders me that people will do the hard work of taking a automatic transmission out and in and give the easy job of rebuilding it to someone else and not put the $120 rebuild kit in themselves...
Taking the pump off is crazy easy once you take the valve body off you can see the back side of it and run a long screwdriver in there and give it a whack from behind and it pops right out...