By selling now, you may have an opportunity to be a non-contingent buyer during the spring, when many more houses are on the market for less money. This will allow you to sell high and buy low.
January is traditionally the month for employees to begin new jobs. Since transferees cannot wait to until spring to buy, you need to be on the market during the holidays and the winter to capture the market.
Buyers are more emotional during the holidays and the new year, so they are more likely to pay your price.
Your home looks great! You’ve either got it decorated for the holidays and family or you’ve just put away your decorations and given it the natural deep clean that happens after the holidays. You can capitalize on that work.
Since the supply of listings will dramatically increase in the spring, there will be less demand for your particular home. Less demand could mean less money for you.