What’s the easiest/most profitable business to start (or thing to sell) online?
This is a serious question for people who are in the e-commerce trenches right now.
I’m not looking for “MAKE 80K/WEEK ONLINE IN YOUR SPARE TIME!” crap. I’m not looking for “turn-key home business opportunites” or multi-level marketing BS. I’m not selling vitamins to my friends and neighbors or having “parties”. I don’t want to be a pornmaster affiliate. I don’t want to fill out surveys or be a secret shopper, etc.
I want to sell things online, most likely through Amazon’s or Yahoo’s marketplace or something like that. I don’t care necessarily what the “thing” is. Ideally, I’d like to have as little inventory around my tiny apartment at any given time but other than that, I just want to know what the easiest thing to sell is and how/where to sell it.

