A lot of people are afraid or stymied by sergers, mainly because some are horrible to thread. I had a beautiful little serger which worked well. But when I lost my thread somewhere, it was a bear to rethread.
I bought a Viking serger six months ago. I was promised it would be easy, but I had a hard time learning to thread it and the store where I bought it was no help. I found another store and now I know how to operate it and I use it all the time.
Make sure there are some lessons with the machine (cost free for a new one) so you learn how to use it. It costs you money having it sitting on the shelf.