that car indeed looks mint and clean. Go and check it out, even the mileage is super low(run it through cartel to see if genuine before you go there).
Some lads like when car is leaning forward, so it may be on purpose that he used lowering springs only on front and not rear. So that wouldnt bother me that much, worse case scenario, if the car is mechanically sound, replacement of springs wouldnt be that dear either