I'm also in the western, US (the PNW) and my bike was stolen a couple of years back. It had a sticker and a registration number from my apartment building, which they called and left their phone number saying they found the bike abandoned and want to return it.
I called the number, and they told me to meet up somewhere in a relatively rough neighborhood. I told them I would love to meet up in front of a police precinct which they turned down, saying they don't have a car and can't get there (told them they can ride the bike to the precinct, and I can arrange an Uber to drive them back but unsurprisingly they said no).
I called the Seattle PD and told them everything, asked if they can help me by sending someone at the meeting site. They pretty much burst out laughing, told me not to go as I will likely get robbed or worse, forget about the bike and move on with my life. (I did file a report for the stolen bike though).
I ended up getting some money from my renter's insurance. The bike was worth slightly over $1000 when it was new (was stolen after about a year). I keep my bikes indoors now.