whenever I look at a part that someone wants to make with a 4th axis you have to ask yourself "could this be made without the 4th axis? and if so how hard would it be?"
If the answer is no it cant be made without the 4th axis then your customer is going to have to pay more. Most shops don't have a 4th and the ones that do probably only can do programing as an indexer. So If you can program for full 4th and the part realy needs it I usually double the price I would for my time if the part was =<3 axis.
All that being said. It actually comes down to what mstras said if your dead slow or the 4th isn't getting any work then the price can and should go down. But hey thats only if you actually want the work.
thanks
Michael T.
"If you don't stand for something, chances are, you'll fall for anything!"