It's all "relative". The term "you get what you pay for" of course has a caveat, and that is, is that you should educate yourself as much as possible before purchasing anything. It is always "buyer beware" especially in today's climate of buying sight unseen in a very high percentage of cases. However, all else being equal, and when comparing animals from reputable catteries, the term "you get what you pay for" will always be valid as applied to how many desirable traits a cat has, its absence of defects, its bloodline proven to be relatively free of disease or genetic problems, and its comparison to the breed Standard. Since size (not weight) is expressed as a linear range, then generally, all else being equal, a bigger cat should have more value than a smaller one, so long as it does not fall outside the range specified in the breed Standard. Facial dimensions, such as eye spacing, equilateral triangular dimension between centerlines of eyes and nose, ear size and shape, eye shape, markings, deliniation, size and contrast of spots are also considered "desirable".