OshPark is fine for bare PCB, but as you point out, they don't do assembly. What does it cost to get a prototype or small production run of a smallish, assemble

OshPark is fine for bare PCB, but as you point out, they don't do assembly. What does it cost to get a prototype or small production run of a smallish, assembled PCB using OshPark + one of the West coast board houses? I want what you say to be true, but I'm suspicious, unless something has changed recently. My research indicates unless you're looking at 10k+ quantity, it will cost OOM more than Shenzhen. But, I'm not familiar with the specific services you mention.