What is the easiest way to sell?

The first rule...............produce/make something people need or would like to have.  If people don't need it or don't want it............it will never sell.

You need to do promoting at a high speed. Inorder to fabricate your image and generosity.

Official statement could be a decent choice for it aswell. ~ settle on public statement power administrations

Do marketing of your business in social media like Facebook, Twitter, Instagram.

You need to do marketing at a high pace. Inorder to build your brand and goodwill.

Press Release could be a good option for it aswell. ~ opt for press release power services.

Vacancies and personal ads from https://begeton.com/

Advice to work as a seller with Amazon

Advertising everywhere.

You've already tried the top three so it could be price, photos or item description not good enough, or there's no interest in what you're selling.  There's always the flea market if you have one where you live.

Hey bozo, that's because those are selling mediums.  NOT the people who purchase the items.

You don't say what you are selling. In general though, lower the price.