Sounds like you have bought into a few dropshipping scams, well I call them scams, but for my own reasons where other may disagree.
If you are looking at selling on a platform such as ebay you will need to source better than wholesale to compete in 99% of items, unless you can find a niche market, a market that is under serviced, but they are like looking for unicorns these days.
If you are interested in things like jewelery, then I would consider going to some weekend markets. Take a look at what people are making themselves, because the one thing I have learnt is that just because someone knows how to make something, they don't always know how to market it.
If you can get yourself in amongst a few suppliers like this you can be a huge benefit to them by offering your services to market their products online.
If the products are unique and popular, you create a niche market that other sellers can't tap into, protecting your source, while providing a valid marketing service to your suppliers.
Win Win, just switch on that creative side of the brain and you'll see doors opening where you didn't even know doors existed!
The biggest mistake people make today is they all want to find unicorns online, and of course if one can find it, then 10,000 thousand can and it no longer even resembles a unicorn.
The real unicorns still exist, they just lay waiting to be discovered by a keen eye in the offline world. Always remember, as popular as online commerce is, there is still more commerce carried out offline.