If it's dark and you don't have a light or infravision and try to buy something, you get the message "I don't have anything to sell today." which is a bit misleading, when really it's just that you can't see what they have to sell.

Example:

Among the hunters tent


A short bow made of oak lies here.
A young boy runs around aimlessly here.
A rather clean cut man stands here trying to sell you food.

<392/648 501/884 191/767 21600> rev
You concentrate a moment and return to your normal shape.

<392/648 501/884 191/567 21600> list
bSomeone tells you 'I don't have anything to sell today.'

<392/648 501/884 191/567 21600> uy knapsack
Someone tells you 'I don't sell that -- try 'list'.'

<392/648 501/884 191/567 21600> c infra
Your eyes glow red.

<392/648 496/884 191/567 21600> list
Item (Type)
< 0 20> some deer sausage (food)
< 0 32> a chicken leg (food)
< 0 45> a roasted pheasant (food)
< 0 95> a cowhide knapsack (container)
< 0 120> a metal canteen insulated in a wolf's pelt (drink container)
< 0 25> a map of Aldevari (miscellany)

Vincent tells you 'See anything you like? A lucky thing you came along.'

<392/648 496/884 191/567 21600>

n/t