I charge $300 to turn the tenon, thread, and chamber. It's another $125 to crown and thread the muzzle. Good work is not cheap and cheap work is not good. I guarantee my work and customer satisfaction which is also a service that has a cost. I'm accustomed to particularly good shooting rifles, so I have high standards and expectations on performance.
If you look at the custom rifle market these days and figure the sum of the parts (completed rifle cost) and back out the cost of all the parts, you'll see that most are charging $600+ for the same service, it just gets cloudy in a finished product.
I build every rifle with the same care and attention to detail that I would put into a championship benchrest rifle. They get 110% of me or nothing at all. Some of us put more effort into things like clocking the runout in the bore to TDC or timing flutes etc.. Higher quality work, mirror finish threads cut to spec and gauged, a chamber with the right amount of polish but not so much that it causes bolt thrust, correctly chamfered edges, and proper machining techniques that contribute to a mechanically perfect union between the parts.
I have a lot of investment in high end tooling, measuring equipment, and gauges. This allows me to do my job in a consistent and professional manner that is 2nd to none. I've spent the money to make the investment to do the absolute best work possible. Years of training with some of the biggest names in the industry and continuing my education through research and practical application has allowed me to elevate my work. There are painters, and there are artists. I feel like my dedication to my craft warrants the prices I charge, which I deem fair for my common man.
Everything costs more these days, but I try and keep my prices fair. This is my profession, what I do for a living, not a side job, and I feel like I owe my customers my best work.