I have just installed a Chinese set on my SX1LP. Three 1 micron scales (I made a mistake when ordering!), 150mm (for Y axis), 250mm(Z) & 350mm(Y), and a Sino 3 axis display unit sourced from AliExpress. Total cost (I presume including taxes as I wasn’t charged anything by the couriers – they came as four separate parcels) came in at just over £200.
However there were no fitting instructions, the included brackets were very basic and the swarf guards way too big for my machine – so there was extra costs in materials and time, but overall I’m very happy with the result.
By the way Dave as I understand it postal costs from China to the UK are actually subsidised by our post office not the Chinese government. Postal treaties obligate the local post office to deliver without charging the sending country. The theory being that they get their costs back on the charges they make when people send stuff the other way. The Chinese postal service doesn’t charge the UK for delivering there. It’s the reason Trump pulled the US out of the Postal Union.