If you can get 8/4 FAS walnut for $8.00/bf, then honestly you don't have much to complain about. It's at $10.75 at my place. 4/4 S3S is $7.90, so you'd be right in the ballpark if you were talking 4/4. Maybe you should take people to the lumberyard to show them their options. If that's what it takes for them to realize that premium materials come with a premium price tag, then so be it. I'm sorry, but I'd just have a real hard time eating the cost when some know-nothing insists on walnut but then scoffs at the price. That's entitlement mentality. "I want this and I wanna pay that." Well TOO BAD. I'm finishing my basement at the moment. Here's what I expect... I want quartz countertops for the price of melamine. I want Brazilian cherry hardwood floors for the price of laminate. I want travertine backsplash for the price of ceramic. I want custom cabinets for the price of particle board BORG cabinets. But guess what? TOO BAD for me! Because that's not what those things cost. You want quality, get out the check book...and that's exactly what I would tell my customers, in so many words. Offer them alternatives, obviously, but stand your ground. Ultimately, losing a customer is better than working for minimum wage. Plenty of burgers to be flipped if that's what you want.
My comment was not meant to be a critique per se. I was well into my journey before being counseled about the tightness of the cap. I also once lubed for rust on a Bailey and got pissed at myself because the lube made the iron dance laterally. Take comments from me as thoughtful suggestions and not the voice of a hand plane expert.