You should have a go. Maybe try a few various things and see how they do. Maybe wath a few smilar things to what you want to sell and see how they do? Now I just wait until free listing weekends as I list quite a few things, and even though the listing fee's are not too much, when you list a lot of things and re-list the unsold things each time they end, it soon adds up to a lot!
I'm listing all manner of things! Various cars bits & pieces, some clothing and other toot I dont want or won't use anymore. Might try some things on Gumtree or pre-loved sometime, but doing a whole lot of new ads doesn't appeal at the mo!