Magical armor includes all armor items. Effects that can be applied to existing armor, such as “+1 Armor” are listed in the enchantments table.
Sane Magical Item Prices was used as a starting point for pricing, but ongoing adjustments are being made to the pricing, and additional items continue to be added to the lists.
DMG – Dungeons and Dragons Dungeon Master’s Guide
GGR – Guildmasters’ Guide to Ravnica
MOT – Mythic Odyssey of Theros
PHB – Dungeon and Dragons Players Handbook, 5e
TCE – Tasha’s Cauldron of Everything
XGE – Xanathar’s Guide to Everything