价值连城（價值連城）　

◎ 价值连城 jiàzhí-liánchéng

[worth several cities—invaluable;be invaluable as sth. worth a couple of towns together;command a high price] 价钱高到可值若干座城池的物品。形容贵重之极

此乃府上之宝,价值连城。谅小子安敢妄想,休得取笑!——《说岳全传》