The problem is characters take quite a bit of time to make and the UE marketplace seems to only want bundle packs. So that means even more characters. Plus you would have to rig them and make sure they deform correctly. And then probably only a select few will buy that pack. On top of that the price for the pack probably couldn’t be near the price of what they are really worth and the time it took to make them, especially if they are really high quality.
Any character artist with that skill is probably going to be spending his time contracting his work out so he actually gets paid what the work is worth.
I’d love for a great character artist to prove me wrong. 