I've Placed an order from quickturnpcb out of South Korea.
I got back a very reasonable quote from TS PCB out of Germany, but after I already placed an order with quickturnpcb. They have a significant setup fee of 115 EU, but that is a one time, and not applied for repeat identical PCB orders, but their prices are very reasonable, especially with 20 day lead times and larger orders (50+). I do believe I will give them a try when I'm off of prototypes. For an order of 20 boards, I was looking at 577 EU plus shipping, but that is a 150x200mm board, 4 layer, 2oz copper on all layers. Even PCBWay is $23/board.
Nice bonus is that TS PCB can apparently do sequential numbering on the silkscreen. This would save us having to apply Kapton stickers, and $500 to buy a spool of customized kapton stickers.
Anybody aware of any US manufactured PCBs that can compete on that price?