Quote Originally Posted by maxmixiv View Post
"Ну о чём речь"
"Базара нет"
"Я так и сделаю"
I'm afraid sarcasm should be conveyed with intonation.
I think these examples are out of context. Sarcasm can be applied to everything.
In contrast, isolated sentence "Кто бы мог подумать!" is used in sarcastic manner very often (just like "No shit, Sherlock").