As you have seen, my bid is on the high end. This is because I'm offering you a GUARANTEE that you will achieve your goals as desired. Guarantees are certainties, and certainties are good. And anything good is expensive.
I need more information on what you're trying to do. When you give me more info, I will then be able to better show you exactly how I will get it done for you, giving you much more than you pay for. Because that's what we all want out of life and all things within it: great value at low price. And for this, I'm your man.
And since I've entered my bid, you should go ahead and award me the project right away and end the bidding. This is because no one else will offer you a guarantee. Even without having the full details of what you're trying to do, I know I can give you more than what you ask. My confidence lies in my perfect understanding of people and the businesses they run. So, I know what they want, and how to give it to them, cost effectively.
As you can see what I've entered in the milestone: that you pay me in full when I give you the guarantee I promise. If I don't give you what you can rely on, you don't have to pay me anything at all. This is support for the certainty I offer.