Help me understand please

[Mjollnir]

Here, I have the perfect example:



There's really no explaining this lol.

Possible they're not calling their retainer from the market wards and/or don't have time to go to the search counter and look up prices, but need the inventory space so want to shift the items at more than they NPC for. Or they want to make the items available to the playerbase at whatever low price rather than 'lose' them to an NPC.

There will always be times where players sell for less than the NPC. Either because they want to provide a boost for their fellow players or they cba to go check vendor selling prices or look online.