Seems like Paypal might be down, at least for quite a few people anyway. Loads of people on Twitter asking when it will be back up. I guess it’s too many people buying Black Friday weekend stuff all at once! I just hope that any potential buyers come back when the issue is fixed!
I confirm it is down for me also. Thanks for the info mate!
PayPal UK is working for me currently 
Yes, I also can’t buy via paypal 
It’s working fine for me now, just so you know!