Starting my business

Hello, im aware that this is a marketing forum but im pretty sure I can find help here for my business that I am trying to start up. Its not a very original idea, but what I want to do is buy items wholesale and sell them at retail prices. I have done quite a bit of research trying to find good wholesale companies to buy in bulk from. I first made the mistake of buying a lot from Liquidation.com. I hadn't done enough research in the beginning and now i realized i basically payed a middleman to buy an overpriced dropship. Right now i am currently trying to break even selling these items on Ebay. Researching I have found a service that many say is very helpful, this is worldwidebrands; they claim they will connect me to wholesalers that normally wouldn't do business with me because im not a huge retailer, you have probably heard of this service and there product sourcing tool. Secondly I found a very knowledgeable youtuber named Kinghuman. He claims I should save my $300 (worldwidebrands startup fee) and find these wholesalers on my own. I would appreciate any advice I can get from this forum, like certain websites or companies I could buy wholesale from or maybe even a better website or place to sell my goods other than Ebay. Thank you.