You can sell online via various means such as your own website, on Ebay, On Amazon and other sites such as Ebid, Overstock and Bluejay.
I haven’t tried Ebid, Overstock or Bluejay so I can’t comment on those just yet but I will be trying them out over the next few months and will update you on my findings.
Selling on Ebay initially started well but has recently gone very quiet.
Amazon in my opinion have fairly high charges but believe me it is worth being on there. They get a hugh amount of traffic and again in my opinion Amazon is a name that people trust.
Selling on your own website is one of the cheapest options if you get a lot of sales. Obviously you have to take into account the cost of the website, the cost of promoting it and any other fees such as web hosting and fees from your payment provider.
I find that using multiple sites or sources is the best way. So that when one of them is quiet another one is working well for you.
What can I sell online?
Obviously this can literally be anything but you need to be sure you can compete with oter websites. Below are examples of things either I am selling online or my customers\friends are selling online: