That is cheap.
Example: "The 14-day cruise is available from us for as little as 900 euros per person". Answer: "That's very cheap. Then I would like to book immediately.
Das ist billig. 
Det är billigt. 
Det er billigt. 
Det er billig. 
Se on edullinen. 
See on odav. 
Tai pigu. 
Tas ir lēti. 
Það er ódýrt.