I invested in two used machines:
Singer Quantum 9940
Janome Magnolia Serger
Robin, her family, and all of the other employees are extremely kind and helpful. I got a great deal, too! Robin supports local DIY designers and upcycle fashionistas to the core. This may sound like an advertisement, but really, I'm just beyond excited about my machines and am even more excited about supporting local businesses! I've only made our Christmas stockings so far, but I plan to sew a jumper for myself this weekend. If I could sew on these machines all day, I'd have it made. I'm totally in love with Quantum Leap and Magnolia, as I've named them. :)
If you've been waiting forever for your very own serger, save up your Christmas money and talk to Robin about investing in a machine you can actually afford. I'm pretty sure they even do lay-a-way. You won't regret it!