I use my serger frequently. It wasn't expensive at all - I found it on close out at Sears for 50.00! It was the last one and the box was still sealed. It is a 4 thread with differential feed. It certainly isn't the top of the line but it meets my needs. I had no idea what a serger was used for but when I saw the price, I figured I could learn!
I would like one with all the bells and whistles but until this one buys the farm...