I agree with Clary, the big expanse of floor in dining room is a bit off-putting.
Perhaps get a couple of carpets from Ikea, and I'd put a big splashy print on the wall between patio door and window.
In kitchen, borrow, beg or steal a Kitchenaid or Kenwood, and put out some fruit in a bowl. Pic on the wall.
In the lounge, move the furniture closer, so it looks cosier, and put a coffee table in front of couch if you can borrow one.
And better photos. Take them yourself if necessary.
Otherwise, it can only be the price, cause the house is really lovely. The above is really being picky.