Why does the following sound strange? Or does it not sound strange to you?

Question

"20 dollars! only 20 dollars": calls out the man.

Answer 1

It doesn't sound strange to me.

Answer 2

Depends what he's selling for $20. Or what he's asking you to do to get it.

Answer 3

It sounds strange because the verb ("calls") is before the subject of the sentence ("the man").  

When speaking, we would usually say:  

the man calls out, "20 dollars! only 20 dollars"

or

"20 dollars! only 20 dollars" the man calls out