L.:
Get a home inspection done on your home...any deficiencies? Get them fixed. Then get an appraisal on the home after you have fixed any problems on the inspection...this will give you an indication on what is happening in your market in Maine - in YOUR neighborhood.
Putting a home on the market in January? I would...IF and ONLY IF houses are selling in my area. If they aren't? I'm not going to waste my time and efforts.
Most people look in Spring and Summer...however, there are MANY people who buy in the winter as well. I don't know Maine's market. I don't know if you are upside down in your home or anything else.
For me the first thing I would do - seriously - is get an inspection and then the appraisal....look around your area - are homes selling or sitting? if they are sitting - what would make your home stand out more than the others?
If you are itching to move - can you rent out first? Or do you already know where you want to buy? Have you been pre-approved for a loan and if so - can you afford it? Soooo many questions....only you can answer!!
GOOD LUCK!