Get your photos redone.
Take the boxes off the top of the fridge and remove the item visible under the bad (can't remember what photo, maybe main bedroom?)
Put a lot of the appliances that are on the kitchen counter into storage. They make the kitchen look cluttered and lacking in storage.
Take photos and art that is close to the ceiling off the walls. Art/ photos lower down are fine.
Remove the art in the children's bedrooms and the blueish picture or photo beside the curtain in the main bedroom. The bunting is ok.
Put a rug on the floor in the bedroom with the wood floor.
Remove the weight rack from the room where the sofas are.
Cut the grass in the front garden and have the edge trimmed.
Put some attractive garden furniture on the back patio and some large potted plants (bright colours) both front and back.
Is that astroturf in the back? Lots of people are very put off by that.
It's a nice house and clearly well cared for. The size of the front and back gardens is a plus imo. Nice driveway too.