Keep in mind this:
800 points = around $10.
400 points = around $5
40 points = ¢50
Do you really want to spend a long amount of time on a drawing only to receive the equivalent of half a dollar?
If you want to share things for cheap or free because you enjoy doing it than by all means do so, but what I'm saying is, don't under value yourself, and for the love of god don't do commissions for 5 or 10 points. You're working for next to nothing if you do that.
What you need to do is find a good place to sell your art so you can sell it at a reasonable fair price that's fair to both you and the buyer. There are places around on dA for t