a letter of recommendation

To: The Secretary of Bree Dear cousin, How have you been? Nat and the girls keep on asking me the next time you can come over for a visit. Anyways, I had something important to ask you. The adventurer that gave you this letter has been an absolute gem. Could not ask for a more helpful person. Would you mind giving them citizenship in Bree as a favour to me? Hope to see you soon! Your Cousin, Maelton

It is a letter of recommendation.
It weighs about an ounce.

You identify a letter of recommendation.
It is an unsellable object.
It weighs one ounce, and it is worth about one celeb.
Its keywords are letter and recommendation.