Posted 03 March 2009 - 10:35 PM
I don't do this type of programming, but, unless you could setup specific agreements with these other merchants to integrate into their website/database, you will probably have to program everything in order to make it connect to the merchant's website and pull the information you are looking for. There could be legal issues involved in doing this.
Your best bet is to see what possibility you have of actually communicating with these other merchants and setting up a way to share information as you are suggesting. However, if you are talking about very large companies, it would probably be very hard to get a hold of anyone who could offer you any assistance or help.
Designing the website, implementing a database backend, and programming the code is probably going to cost you several thousand dollars to have a professional (or professionals) do it. It will probably have to be the collaboration of a few different people because most people who program, do not design, etc..
Writing customized code to connect to every merchant you want to connect to is going to have a pretty steep cost too. Probably several hundred dollars per merchant.
Hosting the site can be done fairly cheap. Depending on how much traffic you expect, you can probably build a server and stick it in a hosting facility, or use a shared server at a hosting facility for probably $500-$1000 per year. The server could range from $800-$2000 depending on what you put in it.
There are just way too many variables to get an exact figure. You need to consult with individual professionals in each of these fields to bring the project together. Good luck though. Sounds like fun if you have the funds.
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