Janome is a really good brand. Their quality is through their entire price range whereas some other brands make crappy cheap machines & fantastic upper end machines.
Go for a 4 thread. This means the machine has the option for (1 or) 2 needles & 2 looper threads. That 2nd needle thread sews a reinforced seam meaning you don't need to whip that same seam through the sewing machine as well. (You can take out a needle if you only want to use a 3 thread to stabilise/overlock the raw edge).
I have an oldish 4 thread Janome Mylock 134 I bought off TM for $130. The guy whom services it says to never get rid of it as they are a very good model. I lucked in there - I had no idea about models when I bought it, I just thought it was a good price & knew Janome was pretty good.
My machine does not have differential feed meaning that I can't adjust how it feeds different fabrics into the machine. I am not sure that I miss it? (I have it on the coverstitch machine & use it there, but don't really know what I'm missing when I've used the overlocker - there's nothing I've not been happy with other than slippery PUL (laminate out) which I think would be a problem on every overlocker?.
A rolled hem feature is really useful. I managed to buy an extra plate (for nearly $50 yikes, but cheaper than a new machine) which means I can do rolled hems on my machine. Modern machines convert at the flick of a switch.
What's your budget?
Mum to 3 beautiful children
Small and Large pocket patterns available, for a small donation to Unicef. DIY kits also available for $5 each with free pattern. PM or email me for more info...