The prices of cable car tickets are flexible. This means that the price is affected by several different factors, for example: creditworthiness of the day, holidays, weather and more. However, you save the most by buying in advance online.
Link to the price list skiareal.cz: https://www.skiareal.cz/cenik/cenik-lanovek
Link directly to the purchase on gopass.cz: https://www.gopass.travel/CZ/homepage