So, you want to create satellite websites and then get link back from those sites to your main website right? Sorry to say, but this looks like an attempt to game the SERP by artificially boosting ranking of your websites.
Moreover, it is highly likely that you are going to slap those satellite sites with thin content that nobody likes, believe me search engines have started hating them too.
Ok, let’s imagine that your main ecommerce website somehow manages to get some value from these inbound links coming satellite websites. But what if a Panda refresh gets the network down and the link juice that your main website has been getting so far will be smashed in a matter of second. All your hard work will go in vain. And please do not ignore Penguin. Your main website could come under the scanner of Google for building links unnaturally.
So, here is my suggestion. Rather than wasting your valuable time and money on building something worthless why not make your existing website AWESOME. You can build a great blog and starts sharing great content that will help you earn Links naturally. There are other things to do. Invest in making your website more conversion oriented, reach out to great bloggers and share your expertise in the form of a great article or tool or whatsoever.
In short, start adding value to your website rather than chasing the crappy links and you will be good.