Sales-Driven Ads for Used iPhones

I run https://icell76701.store.link, a small but growing shop that specialises in certified used iPhones. My priority is simple: turn paid traffic into actual, trackable revenue from the very first day a campaign goes live... (Budget: $15 - $25 USD, Jobs: Digital Marketing, Facebook Ads, Google Ads, Google Adwords, Instagram Ads, Internet Marketing, Link Building, SEO)