Hi and welcome to the site, michaeltechfs
Yes, it is true that electronics is a very saturated category and should be avoided especially if you are a beginner but eventually as your feedback gets more stable and the numbers are getting stronger you can easily sell electronics.
Buyers are a bit cautious in choosing the seller they will buy from especially if the product is an electronic product.
What you're selling may not be your dream product it may just be a stepping stone to where you want to get.
I suggest visiting eBay Pulse to check what are their hottest products. Also search through the forum for related posts, there are quite a few :)
All the best!