does anybody own their own muffler machine?

i am thinking about buying my own machine. i am looking at used ones and just wanted to know what to look for and what are the best brands. i want one that will do up to 3 inch. i have come across huth, benpak, ben peerson, and blue bullet.
which one is a good quality made machine what type of tubing is best to use with these machines?

 

I'm guessing that your asking about an exhaust tube bender?

 

I have seen all those machines in action.. All are fine for production work.. Find a machine with tooling you will use. The dies can add up quick.. Those machines are meant for thin wall exhaust tubing.. I have seen dies available that will bend square stock or bar for them....do you do enough exhaust work to need an exhaust tube bender? 3" is pretty easy now.. The diesel truck guys are going much larger than that.. You may find a shop that has a bender sitting because they upgraded to get a machine capable of 5"....