If you source internationally, specifically from Pacific Rim vendors, now is the season of suck. Chinese New Years--they have huge company parties and shut the country down for a week so all the rural folk working in factories can go back home once a year. Superbowl is when more USAians buy newer, bigger TVs than any other time of year, so shipping channels are clogged with new TVs instead of stuff which doesn't matter as much, like books...
I know next to nothing. I am frequently wrong.