Is there a minimum and a maximum price a skiller can set for his services?
I think that should be completely up to the Skiller.And market will react accordingly.
Yes,as that might turn Skillers away,if they cant set their own price.
Yes, it would, and it would be contradictory to how the market works outside the cryptoverse. I doubt they would do such a thing. It's up to the skiller to determine what his time is worth.