xylogxTired of Amazon
ValdairPrebuilts from brands like Ducky? mechanicalkeyboards.com
DIY kits are generally best bought from their mfg's - Akko, Keychron, GMMK.
More general retailers will have some mix of keycaps, switches, kits, maybe prebuilts and accessories - Novelkeys, Canon Keys, Mekibo, Bolsa Supply (mostly GBs), Vala Supply, KBDFans, KPRepublic (mostly caps), Kono Store, Drop (mostly caps).
I second mechanicalkeyboards.com, the Ducky I ordered came quickly enough and it’s well made. I don’t think Amazon has anything remotely as good as what they’re offering.
I’ll 3rd mechanicalkeyboards.com. I just ordered a new Ducky from there this morning.