Agree with all you said. Search/Finding stuff is always an evolving picture for many sites as it was for Amazon. What you have/need for 5 sellers is different than 100 and 1000 and 100,000, etc. The Search/Finding stuff will need to evolve multiple times a year.

You comments about the gift certificates are interesting. Much the same way me telling a friend to check out Market. How successful will they be without handholding. The less holding, the better all around.