Feedback on Fauna is not everything, being part of the community, being knowledgeable and helpful will really helps too, the key is to be involved in this community, participate on forum or do shows.
If someone comes out of nowhere all of the sudden, and no one has never heard of that person from either forums or shows it not gonna be easy for them to sell their animals, regardless of the animal they sell (who is gonna hand out several thousands of dollars to a stranger no one knows)
My presence on forums since 2006 is what helped me get started, then the first customers help be build my rep and I made contact in this industry that probably would not hesitate to vouch for me.
Again be involved, produce quality animals and the rest will come.