It’s a catch 22 because if you already know the seller but are opting for their Amazon vendor e-commerce channel you’re undercutting their business by taking Amazon’s promo discount today and focing the seller to make up the difference in vendor fees. Then when they get squeezed out of business by cheap knockoffs competing on the same platform in 1-5 years you’ll wonder why you can’t quality products of that type anymore except from niche boutique merchants who have to charge even more for quality than they used to.