For me to take your bid seriously, you have to respond to the questions below to show that you've read and understood the scope of this project.
I want someone to help me develop a script like what you have at echosign.com.
It is a site where people go to sign agreements. For you to understand the way it works, you have to go and test the service free. After testing the service and you're sure of how it works and that you can do it, answer the questions below:
1. Can you state how the service works?
2. Can you list all the features and functionality that will be included in the script you will develop for me?
3. How quickly can you complete this work and what is your price to do the work?