haggle

Syntax: haggle \<item\> [with \<shopkeeper\>]

'Haggle' has the same effect as 'buy', in that it is for purchasing from the
shopkeeper mobiles.  If successful, you will reduce the item price, and pick
up a veritable bargain.  Should you fail, the price goes up.  'Haggle' will
automatically initiate buying the item, so you will have to pay for it
regardless of whether you succeed.

See also: help buy