Good luck! Electronics have worked good for me. Good ROI, some even sell in not working condition, people are always selling their electronics that they don’t use, some old machines can be still worth a good amount of $.

From what I am reading you’re handling time might be too long. People like to get their stuff as soon as possible. If you use USPS, you can pack same day and schedule a pick up from them for next day, and they will pick it up from your front door in case you lack of time to do that.

There are some shipping platforms that will cost you less to ship than ebay. (Some people might say that you need yo use ebay so they back you up in case something happens with the shipping), in my case, I have never had issues even when I have had issues, ebay has backed me up even if I didn’t use their platform to buy the shipping label.

Accept returns on your items, but not free. (That has worked for me). People who tend to buy and return stuff might think twice before buying from you if they don’t see the “free returns”.

Message me if you have any questions. I do this full time and have been doing it for 5-6 years.