If it's coming from china plan on spending another $1250 on top of that $5000 for import fee's for trump's trade war
Yeah, we just got a bunch of Sept 10 A9's, and got the duty hit - it wasn't that bad on ours, I think it came out to about 10% of invoice price, but it can depend heavily on what type of class they pick for the product.
I did not get any duty, probably because it was marked as network adapter, and even though it was opened by CBP for inspection.
You'll probably get a letter in a couple weeks (assuming you used some express carrier) - many times they deliver without collecting the duties first (or at least that's what my experience has been). DHL generally won't move it an inch until they get paid, but UPS and FedEx seem to have some different system.
You have to be careful about what they put on the invoice (for type of class or price), as you're liable to correct that if there's some mistake. One of my friends got hit with that a couple years ago and had to pay massive fines.