Assuming that you are not dealing with the shipping itself, and that you are careful you should be able to avoid any legal hassles. I would suggest avoiding medications, finance and armaments unless you get competent legal advice.
Sanctions/Embargo's: While India has historically been quite lax on following UN sanctions India itself may have a sanctions list of countries/entities that you can't deal with without license. I couldn't find one but you might want to ask a government advisor in the state you are basing in.
Foreign Taxes: As long as you have no physical presence elsewhere than India that will generally not be a concern.
Shipping: If you don't do the shipping yourself you avoid having to deal with import/export forms and requirements. If you do the shipping yourself you will have to do different forms for every location to/from and it will get much more complicated.