I've been trying to do some market research on, in my case, internet sales from large online retailers. I'm particularly looking to try and calculate a Total Area Market (TAM) and Serviceable Area Market (SAM). Any searches I've run on google returned either very expensive market research papers on very specific topics or some older publicized research data not applicable to our market.<p>Realistically, how hard should it be to find this information for free? If it's not going to be free, how much would you anticipate spending for such information? How important to investors is this kind of information?<p>If you work for one of the big boys in online retail, perhaps you could shoot me some numbers for your particular company. It'd be greatly helpful.<p>Any and all help on this subject would be greatly appreciated.