Hi there

You should lower price of some of your models from 100-200$+ to 25-50$, that's the way to go.

When you start a thread with 'one more idea' its hard for others to know what your first idea is, please keep them in one thread or put that here so we know what you are referring to.

There is no limit for any type of licence. You can sell it for $1000 if you like.

You may want to look up what Royalty Free means on CGTrader. There is no set pricing.

Good