Buying unripe fruits

My grandmother would always buy over ripe fruits particularly bananas. Her reason is that the over ripe fruits are very cheap. It can still be eaten anyway although some parts needed to be removed. It was out of frugality of my grandmother to buy those over ripe fruits in the market.

Now we always buy unripe fruits so it will ripen on our dining table. Green bananas take just 2 to 3 days to ripen and we can have it for another 2 to 3 days of eating freshly ripe bananas, not the over ripe ones.