そんな高い

that high; that expensive

→ そんな
phrase Rare #27,025
that high; that expensive そんな means “that” or “such,” while 高い can mean “high,” “tall,” or “expensive,” depending on the noun it modifies.
JA: そんな高い時計は買えない。
EN: I can't buy a watch that expensive.

そんな高い車を買うのはとても無理な話だ

Buying such an expensive car is completely out of the question.

私にはそんな高い店で買い物をする余裕はない

I can't afford to shop at such expensive stores.

そんな高い買わなくてよかったのに

You didn't have to buy such an expensive book.

どうしてそんな高い辞書買ったの

Why did you buy such an expensive dictionary?

そんな高い車を買う余裕はありません

I can't afford to buy such an expensive car.

どうやったらそんな高い出るんですか

How can you hit such high notes?