I have been selling online for awhile using other suppliers outside SaleHoo's training, and from my own personal suppliers i have used over the past couple of months.
I have had so many members here asking serveral questions if its worth setting up a store or not and to be honest, its not even worth it if you have a few items up. However, what you can do is list items from our SaleHoo suppliers (sometimes you will find the same prices on Amazon compared to suppliers here on SaleHoo). Price is not the key - its your titles. To be honest, I have to admit most prices are the same and few items i find here are being sold on Amazon. As long as you title your eBay correctly, and try to be unique as possible (with unique images), you should be sweet to go.
List as many items as possible and once you hit your limits, ring up eBay and get your limits increased again.
Another tip if you're new, you can get recipes and sell them on for 1 cent auctions for 5 days and let bidders battle them out! Just a reminder, you shouldn't only be doing recipes and a max you should be doing is 5 recipes a day.
With all my limits and tips i have provided, yes i am a power seller without doing much work. My eBay feedback was damaged and i used my recipes selling techniques to repair myself to bring me from being below standard to above standard (under global.) Now, i am a power seller from the result of that.