You should register a company and act as it's agent to purchase an SSL certificate from Thawte.com. If you're not familiar with Thawte registration process have a look at their site. I'll pay only after reception of certificate.
You should bid for total cost, including costs of registration & purchase. (I want one-year code signing certificate for Java which costs $300)
Also mention the jurisdiction you register in, and a very short description of annual paperwork tax etc. (I want to decide if I'll need to register another company for my business or I can use the same one)