In my mind there's a direct correlation between your level of patience and the quality of a deal. In the past three months I've come across sub-$1.5k SS/NA, sub-$2k SS/SC, and sub $3k SS/TC donors. Granted, that's only in my neck of the woods, but if you can respond quickly, there's definitely still deals out there.
Cobalt groups, and specifically Cobalt SS groups, are extremely unlikely to provide a deal- folks there seem to think non-running cars are worth $5-6k, whereas if you're searching FB Marketplace in general, crashed or cosmetically tragic cars are going for less than half that.
I think it's silly to see folks talking about how DF needs to come out with a kit on a new platform because there's no more Cobalts out there- they sold over a million of these things, so while it may be harder to find your perfect donor than it is to find parts, it'll be a long time before the Goblin community has taken enough off the roads that we're actually in a crisis.