I think that when we see rates drop down to about 5%, we see those sellers start to come out of the woodwork because even though that 3.5% interest they currently have looks great, a 5% interest on their dream home or next step up is a lot easier for them to swallow than a 7%.
At least in our area, demand is so high, but inventory is so low. You said that Seattle prices dropped by 20%. I believe it! Our market is so dependent on rates because the purchase prices are so high. Not many working class families have the money to be able to shell out a $4k mortgage payment. Then let's not forget how expensive our taxes and insurance are becoming as well.
To be honest, I have seen the market pick back up down here in the last couple of months. Part of me thinks because the "sticker shock" of higher interest is slowly dying down OR the fact that landlords are all nervous about the rent control rumors swirling around and quickly trying to play catch up and get their rents to/near market value. Every buyer that I have helped buy a home that is coming from a rental said the deciding factor that pushed them to buy was because their landlord jacked their rent up drastically.