How much time you actually save going coarser, and what visible quality you lose.
Smart eBay searches we'd start with ourselves. We earn a small commission on qualifying sales through these links; the price you pay is the same whether you use them or go direct to eBay. Full disclosure.
FDM desktop printerEntry-level FDM printers (Bambu, Prusa, Creality) vary enormously in out-of-box reliability. Pay for auto-leveling.
PLA & PETG filament 1kg1kg spools from reputable brands. PLA for most prints; PETG when you need heat resistance or flexibility.
Resin (MSLA) printerResin beats FDM for small detail. Elegoo Saturn and Anycubic Photon lines are the volume picks.
Digital calipersIndispensable for measuring tolerances and fit. $15 Harbor Freight calipers work fine for hobby use.
Bed adhesion + build surfacesPEI spring-steel sheets replaced glue stick for most people. Magnetic attachment makes part removal trivial.
Suggest a niche, calculator, or article. We read every submission — the operator picks one a week to turn into a real page.