1st- I believe they have a hint of metallic mix to the paint which makes them look more like toys than models. Is missing battle or/and age weathering...
2nd- the biggest eye-sore there is that the color's hue are too basic, the white is "really" white the blue is "too" blue, etc so the contrasts are too strong.
3rd- some models have too much gloss finish on them
4th- except for that X-29 and the first Hikaru VF-1 which to me look weather perfect.
5th- this guy sold some of his models on e-bay for about $200+ about a couple of months. I think he's currently selling a Max and Millia VF-J versions