There is no such thing as an average for UE4. There are numerous different jobs that can be applied to the pipeline. Then you have to factor in that you’re talking about a globalized marketplace. An individual from the Ukraine will be willing to perform the same operations for a different pay scale than a person from the USA. Therefore it comes down to individual negotiations of what the buyer wants, what the seller wants, and how the seller compares to everyone else the buyer is soliciting.