You know, I sell both on Amazon and eBay.  Apart from the charges they are pretty similar to sell on, however, in my experience there is one glaring difference.

Each month 3 or 4 items sold to someone on eBay is ‘lost in the post’.  In 2 years of selling on Amazon, no one has ever reported something not being delivered.  I use Royal Mail for all my postings.

Why the difference?