Thanks @chrisinphuket
This market is in District One, Saigon pretty near to where I'm staying now.
And yes, I am Malaysian but working in Vietnam now since last year. I haven't to bargain yet but understanding how much everything cost is the best I can do for now. At least, I know that to survive here :)
Fruits are exceptionally affordable when in season especially when it cannot be imported out.
I ate so many avocados until I got a bit sick of it. Now moving on to other cheaper seasonal fruits.
With the economy and expected global recession, I really have to take care of how much I spend daily.

How's things in Thailand? I heard it's also very strict now