I've been doing a translation for an article and it occured to me that I don't know a one-word antonym for the word 'cheapest'. I tried googling it, and the best suggestion I got was 'expensive', but that's not right since 'the most expensive' is the proper antonym. And it's not a one-word antonym! I understand that it's how the degrees of comparison work with different words, but is there really no direct one-word antonym?
The context is:
After an aesthetic surgery, Lette becomes a success model that is unanimously accepted by the consumerist society in which everything is for sale, and the prettiest package sells _______ (antonym of 'cheapest')
It's from a commentary describing a play by Marius von Mayenburg (Der Hässliche (The Ugly One) in case anyone is interested).