Value is a command that is used in rooms with a shopkeeper mob. This requests the mob to appraise the cash value of one of your items.
In Game Description[]
Syntax: value <item> This will ask a shopkeeper to give you an appraisal of the value of an item you possess. Note that the shopkeeper may not wish or be able to identify a particular item or be able to buy it from you even if he can appraise it. Example: > value spear