If you have some cash and want to buy a motorcycle, December is the best month of the year to get a bargain on one. The guys who have motorcycles aren’t riding them much in the winter and sometimes they need to raise some cash. Winter riding is more dangerous, with wet leaves, ice, and its just plain cold.
So they are more likely to put a used bike up for sale at a good price to raise the cash and since they aren’t riding in the winter it’s not such a big sacrifice to them. If you are a motorhead and can work on bikes, you can score some bikes for a cheap price, work on them each weekend over the winter, and then sell them for a good profit in the spring when people get the urge to start riding again.