Did you receive armour as a reward that doesn't fit you?

I buy armour that you acquired on the battlefield. Give it to me and you'll have a few more Kinah for your next purchase.

I take them even if they're old and rusty.

Show me armour and I'll tell you what I'll pay you.

 Sell equipment

I can't help you with anything else I'm afraid.

 You end the conversation.