Manabu
I've been reselling for a while and it's been great! I recommend it. But watch out that you don't end up keeping most of the items you intend to resell. Otherwise it misses the point.
But only in my spare time. I think about how much I have decluttered in my personal space and don't want to buy stuff to fill it back up... but I do enjoy buying things. I figured to scratch an itch is to buy to resell it. Or I could buy a book, read it, resell it or get through my to be read pile and send the books off onto a new journey instead of keeping them all.