Everyday there is a new product is published in the website for sale, how they are marketing their sites? Can anyone help me out?
there are many ways to promote your product by viral marketing , bulks SMS, offering product by SEO, online promote, ect.
make your product name, images keywords wise also submit your site in some communities site use twitter and other net working site
You could try publishing free blogs about a particular affiliate products. (See blogger.com for example). I publish such blogs made to look like a classic website and monetise them with adsense too. In addition I publish link articles to each new page in various articles published on free article publishing sites. I use sites which offer a share of adsense revenue and do not take ownership of my copyright.
Make Online Portal or Add your product feed in Google Merchant Center, Some Paid marketing like add product in ebay, business.com, and amazon etc..
There are many ways of marketing the products if you want to get quick results then go for advertise your products on Web and if you want to gain long time interest of of the customers then go for SEO and SMO for your website
If your product is of quality, then you and use advertising networks to sell your product... advertising networks will be best in this case