lve made about 400 dollars in total. Do I have to report it? I don't work and am getting financial aid in college.
If you are buying items to resell on eBay, yes.

If you are selling your old stuff for less than you paid for it, no.
if you are just selling off your own stuff, probably not
but if you are doing this on a fairly regular basis with mdse that is not necessarily your personal stuff, yes, you should report on Sch C
yes, u do, as u r considered in self employed business