Yes you can! As a matter of fact, you can make a fortune buying and reselling on amazon.

There are two ways, actually three ways you can make money by buying and reselling on amazon.com

First way is called Seller/Merchant Fulfill.

This method involves Seller being responsible for shipping, handling and customer service of each product sold through this method.

Second method is called Fulfilment By Amazon (FBA).

This method is the easiest and most convenient way to sell your product on amazon. Amazon take care of everything for you from shipping(to customers), packing, handling, delivery, and customer service.

Third method is called Dropshipping.

Allow me to go into details of the methods mentioned.

Seller Fulfill:

Assuming you have a used camera you want to sell on amazon. You go to your seller account and list the item for sale.

A buyer buys your camera. Congratulations! Your item has been sold, Buyer has paid for your item… please Ship!

Amazon hold the payment until you ship, upload tracking information and the item got delivered to your customer.

What you do next is to pack your camera, go to USPS(or any courier you prefer), ship to your customer address, obtain tracking number, upload the tracking number on your seller account(this shows both buyer and amazon that you have shipped the camera), reply to your customer inquiry(if any), resolve any issue your customer might encounter…

This means you are responsible for everything from shipping to delivery of the item you sold.

After the transaction was successful, amazon will disburse the payment they received on your behalf to your account after they have removed their fees.

FBA:

Lets say you found a product on alibaba for example:

 

Nikon MLL3 Remote Control.

Lets say this remote is listed at 2usd on alibaba but this same item is been listed and sold at 10usd on amazon.

What you need to do is to buy(preferably in bulk) from the seller on alibaba.

When you received this item, you then ship to amazon warehouse address provided to you when you create your listing.

When amazon receives your products, they process it(usually takes about 5 to 14 days depending of product type and quantity). After amazon accepted you products, your item will be available for sale on their website.

You will be able to monitor your product from your account. You will be able to know when your items has been sold, quantity remaining in your inventory, you can change the price of your item, e.t.c.

So whenever your item sold, amazon will pack, ship and deliver your product to the buyers. All you have to do is to keep an eye on your inventory to see if you need to replenish your inventory i.e send more products for sale.

Amazon will take care of everything on your behalf including customer service and returns…

Mind you, amazon charges extra fee for their fulfilment. you can calculate the total cost here: Fulfillment by Amazon Revenue Calculator

Dropship:

This method is simple and easy but you must first build a genuine relationship with your supplier before using this method. Instead of receiving the products you bought on alibaba by yourself, you can ask your supplier to ship directly to your FBA warehouse.

Those are the ways you can sell your products on amazon.

You can follow this link for a guide on how to get started: Amazon.com: Amazon Services - Training and Tutorials

Good luck!