That depends on which machine. I have 1 18" in. Indexable two position rotary head with all the angle plates, and 3, and 4 jaws, and flat plate mounts for custom compound milling. I have so many specialized tools, mechanics ask me to borrow them. The special valve adjustment tool for Mercedes Benz's 450 SL, frankly, all the over head cam Mercedes, costs around $400 to $500 bucks now. I have tons of unique hand reamers that are adjustable, boring heads, multiple circular milling heads for doing manual compound radii. These things weigh around 60 lbs.. The list goes one, then of course, there's the electronics sides. I have one tool that is no longer sold to the public. It was the same one used on the space shuttle. It cost me $485 bucks in 1986! I made my money back with that circuit tester in 4 weeks. As far as wrenches and sockets, I have quadruples of everything and at least one impact version for each size. I have the tools to make the specialized one off tools, which I have done more times than I can remember. I have the same Tube notching tool used by NASCAR, which I got for almost nothing after helping the guy with a redirect on his companies website. He gave me a $700 dollar notcher for $100 bucks, to cover his shipping and handling. Great for making Roll cages, custom exhausts, etc. My 450 SLC (1975) was the only one with dual exhausts. I had so many people ask me to make them one, but I didn't want too. People with these cars tend to me kind of jerks sometimes, and they figured if you made it, it shouldn't cost too much. I have the tools to make tools, and the welders to weld up to 1/2" inch steel down to .012' thickness easily.
I don't have the back for it anymore though, so I am not as productive, but my machinery is well lubricated and ready to go. I haven't purchased a ready made exhaust in over 35 years. I just fix the old ones, usually not spending more than $35 bucks. I am very cheap when it comes to stuff like that. I even cloned a muffler for a Mercedes I needed, but retailed for too high of a price. My son will be getting and has enough access to my tools to create his own business or invention, coupled with the CAD programs I have. That's the nice things about tools, they are always worth something, and if I had to get rid of them, for some reason, someone in the same field would jump on them. I actually don't show what have to many (read any) people, because they always ask if they can use them, and you never loan out tools, except to very special people.
