it's not so much the animal looks really bad, but a skinny animal with a very obviously filthy home (which the person taking the photo didn't seem to care about) raises some red flags in my head. i don't want you to spend money on an animal that could have existing health problems they might not ever get over, so you'd pay money for a sick animal that could potentially die.
keep your eyes out for another, as i can guarantee there will be another one, that is plump and in a cleaner home.if i'm spending my hard-earned money, i want nothing but the best!