After seeing this I thought I'd email Sitopway for a quote.Just received it and they quoted me 50USD for 10pcs 100mm x 100mm dual layer, red soldermask, top/bottom silkscreen on 16mm FR4.That's 20USD more than Elecrow, so looks like I'll be sticking with them.The OP said 5.2GBP for 130mm x 140mm, so I wonder if that was just per single PCB, ie 10 pcs was 52GBP? That would make more sense at about 80-90USD for 10 pcs 130mm x 140mm, based on what they have quoted me.
I'll probablly give Sitopway a try too. Digging around their website, I see they do PCB Assembly too (which PCBCart doesn't). And with small minimum orders too! Yeah, PCBCart is a no-go for first prototype run, but for bulk orders of a proven design, it's great. Another good company (based in Canada), but PCB manufacturing/assembly done with their partner in China, is Myro.ca Prices just a tad bit higher than PCBCart, but quality seems also better.... I *love* their gold plated pads option (but unfortunately, they don't do large areas of gold, like card edge fingers).