It really depends on what you are selling and who your target audience is. If you are selling curtains or soft furnishings your target audience is women and Pi

It really depends on what you are selling and who your target audience is. If you are selling curtains or soft furnishings your target audience is women and Pinterest is your best channel. If you are selling dog food and beds your audience is general public with an interest in dogs, facebook is the best channel for general public, find a dog related group or buy and sell group make a post and then pay to promote it. If you are selling something more business focused like an accounting service then Linkedin is best. If you are selling something technical like a developer tool then reddit or stackexchange. My point is that your advertising channel is not determined primary by budget but rather by your target audience and your target audience is determined by your product or service.