list
list [shopkeeper]>

This command lists all that is for sale by a certain shopkeeper. The numbers in brackets to the left can be used in place of names when buying stuff. For example, if you saw this:

list These items are for sale: [1] a scroll of armor 8300 [2] a scroll of teleportation 8430

You could buy 2, or you could buy 2.scroll, both will be the scroll of teleportation.