I put most users in the under $5 category. With ball bearing pad at the high end, plain at the low end. Don’t know of much driving user value up, except the size. 6”, 12 & 14 seem to get a premium. The hex grip never struck me as comfy. Combo chucks that will do square tang and round are nice, npbut mist sellers don’t recognize any of those differences.
no idea on collectibles.