Market value is all related to supply and demand...

Dominant and co-dominant morphs all have potential to fall in value each year due to the fact that you only need one to produce many more. The longer a co-dominant or dominant trait is produced, the more there will be each year, thus lowering their market value.

Recessive morphs will tend to hold their value longer due to the fact that it takes a longer amount of time to produce more.

Here's how I would rank market value of morphs from least expensive to most expensive:

1. Pastel
2. Yellow Belly
3. Mojave
4. Spider
5. Albino