I've been on a binge looking at different shaving brushes, and I'm having a bit of a hard time understanding pricing. From what I understand a good portion of the price can come from the knot (if it's included). But what about the handles? Why are shavemac, M&F / Brad Sears, Plisson, Paladin, etc. handles so expensive... is it just the craftsmanship? Is it something else...? I can understand if the handle has expensive wood or horn... but what about the typical resins? The only brush I own currently is the Omega 48, and I'm looking at expanding the brush collection.