hey..
for the business you described above needs some capital because you by yourself alone cant do each and everything for your website to generate business. Specially when today there is a lot of competition in every category business online.
so, if you are looking for an online business online or for an online auction site than for this you need : 1 good designed ad developed website including all the necessary factors for online business for eg. URLs for the pages for your site should be search engine friendly, your site structure , internal navigation, GUIs, content, keywords, or keyphrases. My means to say is that your complete site should be a perfect site from search engine point of views. because most of the internet users comes on the sites like yours through search engines, so, you can choose a company which is too good from search engine optimization point of view also.
If you really wants your project to get success you can contact us on “mdinfovision at gmail dot com” for gtalk also you can use this id, or visit us on an online internet marketing company.