Do you think they will ship without you paying first?
There are many other red flags in that listing, I wouldn't touch it even if paying by PayPal, especially after it's been bid up to $1575 last time I looked.
Location - London, I doubt any mining farm could be located there
Delivery - by mid-October (at least to the US, not sure of other locations)
Stock photo
30%+ discount for no reason (there is no newer hardware to upgrade to)
That's just from memory, too lazy to open that link again.
I decided not to proceed with the deal for various reasons but just to clarify:
Miners were in Guangzhou, China not London. I'll be in China in 2 days so I'd pick them in person.
Miners were used and without warranty hence the discount.
If I have some time to spare while there I'll try to understand if 2 btc per used S9 is a common price or not.