advertising for online business

I have recently started an online business at www.gbncommerce.com. My question to the forum is can anyone tell me which site can help me reach a great volume of customers. Keep in mind, I have a limited budget for advertising

You can also sell your goods at ebay, this way you can make money and also have a great way to advertise your site!

Retargeting your ads to your customers is a big help for selling your products in your site.

It can help you keep your brand/products in front of traffic after they leave your website. It's a great a tool to help companies reach their consumers who doesn't easily persuade with their products.

Try to work with Demand-Side Platform (DSP) like Bluagile.com, They are self-serve platform.
They can retarget your ads in facebook. They can also target your audience with your desired geolocations globally. They can also include and exclude websites for your campaign. Check them out and see if it fits your needs.

Since you have limited budget, You can concentrate on Content marketing and Email Marketing. While Content increase your reach-ability, Email marketing directly cover your targeted audience.