Trying to buy something off Aliexpress (a Bluetooth MIDI adaptor, for the curious), when I clicked "Buy Now" the payment page came up and the "PAY NOW" button appeared briefly, then disappeared. I tried a different browser, tried putting it into my shopping cart, nothing worked. Searching for answers, I found that the issue might be only having PayPal as a payment method. I added a credit card as a payment method and hey presto, I could pay. I know I'm not alone in buying from Aliexpress, so thought I'd post this in case anyone else fell foul of whatever's going on.