I look at the other way around. How the H$!! do mass produced bow companies justify a price anywhere near what a custom bow costs? Take a look at the Bear bows in stores today. The fit and finish is a joke. Martin bows are the only "production" bows I know of with good craftsmanship but they cost just as much as the average custom bows.
I think it's a pretty small percentage of custom bows that break the $1,000 mark. Most run $400 to $600 and some you can get for less than that.
I like going to the bowyers house, picking out the wood pieces, shooting some of his in stock bows and getting input on wood combinations or anything else related to the design of the bow. Then, down the road if you have any problems, you also have an actual person to contact. The odds of him making good for you on the deal are better too.
I was reading a while back where a guy said he preferred a big bow company (Samik) so that if he had a problem they could just send him another bow from stock instead of him having to wait for a replacement to be built by a custom bowyer. I guess that is his right but for me, once I've owned a bow or gun, it is mine. If something happens, I want THAT bow or gun fixed and back in my possession, not just another one pulled off a rack and mailed to me. That's okay for tools or appliances or something like that but to me, bows are far more personal. If a bow is not salvageable, I will gladly go back through the process again with the bowyer to have him make another bow that will be MINE and special to me. Only had to do that once and I still wish to this day I'd have been able to keep the first bow just to hang on the wall.