cookiecrafter
Senior Cook
OK -looks like a blast from the (January) past, but I´ll weigh in with my 2 cents.
I look for firm onions, that´s it - no blemishes, no softness, no bruises. Depending on what I´m cooking, I might select white, yellow or red onions: the red onions tend to be much milder.
In general, I don´t like HUGE vegetables; I prefer the smaller ones, because I think they have better flavour. The bigger, the better does not apply here. I go for the smaller, the tastier.
Some produce companies/wholesalers etc freeze excess and sale at a better price or demand. Bananas can be frozen when unripe (green). Some grocery stores invest in crops and freezing is profits.