Amazon and eBay are two popular sites for online shopping. Amazon is an online store, and eBay is an auction house. The main difference between the two is that eBay is a site where people go to purchase and sell their stuff. Amazon, on the other hand, is protected by the laws and parameters that stores are required to follow, and they are bound to providing service and warranties to their customers. With eBay, you deal with another person, not the site itself. If your transaction goes sour, eBay is not legally bound to compensate you.
Therefore, a lot of scammers hit up eBay. The products on Amazon, on the other hand, are brand new. Prices are lower on eBay because of the way it is set up and rampant with bargain hunters. Also, you can return items purchased on Amazon, but not on eBay. eBay is more like an online garage sale.