The fact is, selling on eBay isn't easy. It's possible, and lots of people do make a lot of money, but it takes time & dedication. You wouldn't expect to be a concert pianist in a couple of months would you? To be successful at anything, you need to put in the blood, sweat and tears!
As DropShipWholesalers says, niche products are the way to go. And you have to work out ways to minimize eBay fees so they don't impact on your margins too much. You can use eBay's value packs, eBay stores and host photos from another hosting site or your own website.
Some people are prepared to put in the time and effort required to come up with the creative ideas necessary to differentiate and be successful, while others will give up when they don't start raking in the dough in a couple of weeks and move onto the next 'get-quick-rich' scheme they stumble across. Which group do you want to be in?
We are more than willing to give you as much help as you need on the forum etc, but only you can put in the time :)