Unfortunately that won’t work. The listing agent will want to be compensated for representing you in addition to the seller. Two of Yoreevo’s co-founders tried this unsuccessfully, inspiring the creation of this consumer first company.
In addition to a haggle-free rebate, working with Yoreevo also means an experienced agent looking out for your best interests. When going direct, you expose yourself to dual agency which is very much a grey area (and illegal in some states).