The fact of the matter is that unless you can get past the catch 22 of needing both a critical mass of buyers and having a critical mass of good domain names .. then it doesn't matter what your commissions are or how good your platform is .. because nobody will even care.
You need to have a LOT of marketing money and/or connections so that when you start you have good domains to sell AND you have a lot of buyers so that it's worth it for sellers.
PS .. I also STRONGLY suggest you get somebody else to do your English communications .. your English obvious isn't very strong, and it's simply an unfortunate fact that people will never trust a platform where the spelling and grammar are bad.