Yeah, that video will be linked from our index page to show demo. Regarding accent, yes that is one thing we need to fix. I and my partners all are Indians (moved to US almost years back) and hence have heavy accent. I am trying to find somebody who does not have accent and willing to help us do the narration.
About negotiation process, buyer can attempt as many times as he wants to negotiate the price, but if it is accepted then it will be locked for that particular product for that particular buyer. We have written pretty smart algorithm for negotiation and it will be impossible for buyer to know the minimum because it keeps on changing based on demand, requests, popularity, and lot of other factors.
So far we are 3 working on this parttime. We all have fulltime jobs and are developing onista on weekends and evenings.