Just for grins, I checked my local Craigs List.... 21 different postings, prices ranging from $100 - $900 (the more expensive ones were "industrial" sergers.
I use my serger for making little sun dresses for my nieces... and now that I have a new granddaughter, she'll definitely get lots of little sundresses.
I also use my serger for my pillowcases - "Million Pillowcase Challenge" - plus I make a set of two pillowcases for my longarm customers for their quilt to "go home" in, instead of a shopping bag. A little pricey for a bag, but it sure does create repeat customers!!
BTW, my serger is a Singer, about 25 years old, manual everything, but once you get the hang of it, they're little workhorses!!