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Jyutping hoi1 tin1 saak3 gaa3
Pinyin kāi tiān suǒ jià

Definitions (粵典–words.hk)
  1. 語句
    定出​一個​雙方覺​得​過高​,​唔​合理​嘅​要求
    to state a high selling price
    • 你噉樣開天索價,邊會有人肯買。
      你噉样开天索价,边会有人肯买。
      nei5 gam2 joeng2 hoi1 tin1 saak3 gaa3, bin1 wui6 jau5 jan4 hang2 maai5.
      You are stating such a high selling price. No wonder no one would like to buy things here.

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Jyutping hoi1 tin1 sok3 gaa3
Pinyin kāi tiān suǒ jià

Definitions (CC-CANTO)
  1. quoting at an unbelievable high price (spoken)
Definitions (Wiktionary)
  1. verb, Cantonese
    to overprice
Definitions (Kaifangcidian)
  1. 索高價 – 索高价
  2. 漫天要價 – 漫天要价
Examples (粵典–words.hk)
  1. Cantonese
    你噉样开天索价,边会有人肯买。
    你噉樣開天索價,邊會有人肯買。
    nei5 gam2 joeng2 hoi1 tin1 saak3 gaa3, bin1 wui6 jau5 jan4 hang2 maai5.
    • You are stating such a high selling price. No wonder no one would like to buy things here.
  2. Cantonese
    开天索价
    開天索價
    hoi1 tin1 sok3 gaa3
    • to ask an unreasonably high price