I've got a party of 5 level three players. In an upcoming session, they might be facing a monster with plate armour. The (humanoid) monster's CR is one, but RAW his plate armor is worth 1,500 gp.
I'm not worried about players selling this armour - I'm happy to follow the advice given in official sources and say it's not in good enough condition to sell. I am concerned, however, about my party getting a fighter/cleric with an AC of 20. I generally understand item cost in 5e as an indicator of what items should be available at particular tiers of play, with strong parallels to item rarity. It feels unwise to give my players something this precious this early in the campaign.
Would giving my players plate armour at tier one make them stronger than the encounter difficulty calculations for 5e assume them to be?