Sales continued to be brisk in the Northern Virginia housing market in November. The problem is that inventory – the number of homes available to sell – continues to decline as sellers aren’t getting the word that it’s time. Inventory is down to less than 4 months’ worth of sales. I only can see it getting even shorter as we hit the holidays and cold months (brrrr!) – but will there be an explosion in March/April as the tax credits reach their inevitable end?