options: m : you used to only buy things on sale . m : why do you think such discount is expensive ? m : even the special price is too high , i think it 's a good buy . m : i do n't think it 's very expensive , it is the best deal .
article: m : what do you think of my new sunglasses ? they 're on sale for only $ 150 . f : on sale for $ 150 ? i ca n't imagine what the regular price might be . i do n't think i 've ever spent that much on a single item before .