Quoted from Rarehero:

I always find it weird when thousands of dollars in mods go into a Pro. He point of the Pro is that it’s more affordable because features were removed. If you can afford all this stuff anyway, why not get the Premium or LE & call it a day?

Quoted from swampfire:

It’s not weird at all. It’s just choosing a different set of add-ons than the ones Stern offers with the Premium. I know I’m oversimplifying, but do I want a hammer and a physical ball lock, or do I want a ColorDMD and PDI glass?

Quoted from Goronic:

Some mods, like colordmd, shaker and improved glass are ok and should hold value. But the rest will get pennies to the dollar. Except for a rare number of your mods you will need to drop the price by a hefty amount or just take out of the price all together. Short story modding your pin rarely increases the value of the pin by much.