All of those are good... and there are plenty more that are, as well.
It's not so much about "what sells well" - it's about knowing WHERE and HOW to sell it. "It" being just about anything. First find out if there is a buying market for any given product or topic... then match the product to it, and put it in front of that market.
You can find out what people are looking for by using (they have an unlimited free trial) or by using the Overture Search Term Suggestion Tool: http://inventory.overture.com/d/searchi ... suggestion.
You can sell anything from loans to blue jeans, bird feeders, or even Elvis memorabilia. It's just a matter of putting the right product in front of the right market!
A lot of people get stuck on the idea of selling home business opps or internet marketing material... but the web is A LOT larger than just that. There are people coming online every day to buy MP3 players, used household items, collectibles or rare coins, to download music or movies or to buy posters and tee shirts. The potential markets are almost endless!
p.s. Here is a free report on "Finding Products That Sell!":
www.webservicenetwork.com/free-report.htm
Also, I think I have already given you this link:
And there is a 2nd article, titled: