It's a matter of morals really.

Josh hired me knowing that this was my first ever attempt at skinning Magento. He knew the risk of me not being able to complete it.

We agreed on $300 for the complete Magento skin; then 3 additional phpLD skins for an additional fee.

In the end what he did get was a 50% complete Magento skin & a phpLD skin for $150.
Clearly that's $150 too much.