If you want to sell characters on Marketplace and have no angry buyers hunting you, you pretty much have to ship a 8 LOD rig to have everyone happy; that is like making 8 characters for each Character you actually sell + add now customization on top of that.
Bofere you notice people are also demanding specific changes and more and more free additions which take a lot of time to implement.
This is why I make character for myself and I don’t sell them…
I would only think about selling Characters if I had like 2 months free to dedicate for that single character only, maybe not even in that case as well; and then after you put 2 months of hard work on it people will tell you “$150 cost too much, no thanks!”