Working button holes, for any practical purpose, are useless. Those of us on the forum that are detail minded enough to care about working button holes surely are not "rolling up their cuffs" at work.
They are in the category of understated elegance.
As for the pricing, when you're dealing with anything less than couture clothing houses, I expect itemization and a breakdown of options. The allure of couture is the fixed price with "everything" included. They factor in the shopping assistant driving out to an estate and dropping off clothing items.
I do understand the argument, but in the end of the day, an informed buyer will always ask the right questions to get the right price quote. If in the end the price is what you're willing to pay for the quality received, then what else is there to talk about?
I paid C.M.T $480 for the sport coat, $15 (or 20) for the working button holes and $20 (or 25) for pick stitching. I'd rather not pay $525 and have him assume i wanted working button holes and pick stitching when I might just want to pay $480 for a simpler coat. It's a sliding scale as well, I was using super 130 suiting that I brought in. Had it been super 160 the CMT rate would have been higher just as it would have been lower had I been working with super 90's suiting.
I think it's all quite fair. Every buyer is different, hence allowing every buyer to choose the options they want without priced in assumptions. That's the whole point of bespoke / custom in my point of view.
P.S. - I assume it goes without saying, but Richard Lim's quality (quite high), in my opinion, far and away rationalizes his prices (which obviously aren't outrageous in the least).