I have used Ebay since it didn't have an Australian presence (and a few years ago found that I had two accounts in their various databases, with the same name - causing a little bit of a mess).
Buying on Ebay is a snap. Mostly. Selling on Ebay can be frustrating, especially with the way they hide most of the costs until well after you have sold your item. On the bright side, I was able to avoid disaster a few months ago. I sold a smart watch, and before posting it rechecked just to make sure it booted okay. Nup. /panic! Fortunately, I was able to contact the seller, immediately refund their money, and avoid all the fees by doing what turned out to be a fairly simple cancellation.*
My sister suggested I try Gumtree for sales, and so I wandered over there to find that I had no idea how to find anything I might be interested in. It seemed full of stuff that nobody wanted, although that was only my first (and second, and third) impression. Maybe I should give it more time.
Finally, a quick comment @BrendanMays - not all of us are on BookStuffFace (I realised I need to stop calling it BookFace when I saw a physical bookshop of that name).
*Speaking of which, anyone here interested in an LG first generation smart watch? Comes with a brown leather band rather than the original plastic, and does indeed work now. Comes in the original box, with original 'instruction' manual and charging pad etc. (Maybe Choice Community can expand into a new area of expertise as part of its burgeoning online domain...?)