Ebay can be very rewarding..but also can be a pain. HA. You can put in as much or as little time as you want. If you are a full time employee elsewhere then maybe a few hours in the evening or on the weekend will be enough. You can sell almost anything you want. There are a few guidelines and I don’t remember what is on the no-no list. I have seen lots of craft things on ebay. If you have a certain talent and would like to put this up for sale then go for it.
Remember tho you are charged a fee to list. Once and item is sold then you are charged a % of the sale amount.
People sale all manner of used things - from cloths dishes - etc.
Also, I would invest in a heavy duty postal scale (I bought mine from another ebayer for about 40 dollars) You want to make sure you charge enough for postage or you can loose money.

Perfect formula:

1. Specialize in something (I specialize in computer parts)
2. Scour the “Job Lots and Wholesale” category, looking for a bargain.
3. Research what you have bought, fix items up and list separately, making yourself look as official as possible.

100% feedback on over 100 items is worth a lot! Make sure you keep your customers happy!!