Cause normals tend to be older and it is usually the older 5, 6, 7 year old females that are 2500-3500 grams. The really huge ones over 4000 grams are fat and probably 10-15 years old. Most morphs we know of that are readily available aren't that old and haven't gotten the weight on. Also no breeder will get rid of a 2500-3000 gram female breeder morph, can you say 8-10 eggs?