For this photo being with the bananas facing towards viewer, I think should have more macro or detail as to get closer ... Though there is a dof here, and the black background is ok with the light a little more tilt on them bananas would make a difference and we could see some more black specs ( the bruises in the fruit) ... It is a wonderfull shot for still life and I enjoyed studying it.. Check out some of my baby bananas I have sometime..
not sure if it is my monitor or yous, but I can see a lot of editing marks where you did some editing to remove some dust or unwanted artifacs in the image., mostly in the black areas
I like the simple composition and the compelling color palette. I'm finding the cloning tool marks left by the clean-up around the bananas distracting (If you're using a Wintel monitor its possible the marks just to the left of the bananas blend invisibly into the background.)
bananas are blown out on the top part mainly because of direct light onto them. the background has details which is not good.. i think you wanted to put a black background, but ended up with this.... selling this as a stock won't get you good results