help buybuy [howmany] <object> [from <who>] [for <who>]
In a shop, attempts to buy item specified. If there are more than one object sharing the same name, you can use the item number instead. If there's more than one shopkeeper here, you'll have to specify who you want to buy from.
If you want to buy more than one item, just place how many you want before the item name or number. This can be "all", which means "as many as are in stock".
You can also specify who you want the shopkeeper to give the item for - this has to be a player, though.
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