Well I payed 400 USD for Avalon's scripts.
They are good scripts, and worth the money.
That was the price to buy them outright. I could resell them but I am currently supplying sub mods with them for free.
I only payed 120 out of pocket and pretty much made that back so I use them to help mods since i'm not a jerk off trying to make a profit.
The coder deserved the money for his hard work, and I have no regrets paying him that amount.
He did what I couldn't do, so I payed him for his knowledge. Knowledge is expensive.
But seriously, if you have seen the amount of development involved, you would agree that 400 usd is cheap for this kind of coding, it was practically 3 languages.
Just let that soak into your little brains.