If I were to write "aiyaa, 这是太贵了!“
Wondering how to show exasperation in writing? Or how to write the aiyaa?
汗 is also an awesome nonvocal way to express exasperation in written Chinese.
CC-CEDICT:
3 to be speechless (out of helplessness, embarrassment etc) (Internet slang used as an interjection)
You could totally write: "汗, 太贵了!"