If you really want to compete with Amazon or eBay sellers, the best thing you can do is purchase those Converse shoes in lots! However, do note that wholesalers also sell on these platforms and you don't want to compete with their already low-priced items.
Another way of avoiding the competition is by selling on other auction sites. Craigslist is also a good place to sell if you live in the US. Also, SaleHoo has it’s own web store for a separate purchase Link hidden: Login to view
SaleHoo Stores gives you the opportunity to avoid competing with other sellers in other online marketplaces like eBay or Amazon. It even has it’s own marketing tools such as coupons, and newsletters, targeted most specially to repeat customers. One really helpful feature with SaleHoo Stores is that it comes with an SEO module, so getting found in google and other search engines will be easier for you.