In normal times there are two periods in the year when things are slack for people selling their harps: now, the holiday season; and late Spring when there are more bookings for weddings, concerts and other gigs.
It’s possible, indeed probable that with the corona virus spread in Seattle as well, people are just not thinking about selling. I doubt that the California and eastern WA wildfires have anything to do with it in the Seattle area, but that’s always possible.