i consider when people get paid most common pay days are 2-4th of each month and 22-28 of each month and fridays. also people on benefits on thursdays for tax credits can be a busy day.
as for wii prices i know what you mean i was looking at wii music for £10 delivered by dropship. was selling for £20 at beggining of the week now its £13.99 on ebay! big price drop