Customs delay from China. How long should I reasonably wait?

That’s horrible ,for example I bought 2-3 things from Denafrips and LHY -  Jays audio , 3 business days not counting weekends , on average ,that sounds Waay too long .

If this were true then Aliexpress would be out of business.

Packages from China are being more thoroughly inspected due to counterfeit items and illicit drugs being sent to the US.  I have had packages caught in customs from China which the manufacturer has re-shipped that arrived months after the re-shipped package arrived.  

I had a similar experience with FedEx when importing a preamp from the USA to Australia. It was stuck with either Australian Customs or FedEx and I couldn't get any information from either. In fact it was virtually impossible to contact them at all. It took over 3 weeks to get an email from Customs indicating the amount of duty payable..

I would never buy any audio equipment from China. 

What do you think is going to happen? Seller can’t get it sent back. It’s out of their hands and yours. Maybe take it like a champ and understand the situation at hand. I’ve had to wait two months for a package coming from fedex and it was at a hub a couple miles away just sitting in a container when the place was backed up. Your situation is no one’s fault and happens to the best (and the worst.) of us. Customs gives absolutely no care in the world about any of us. Yea, it sucks but oh well. Be happy sooner or later you will get something really cool in the mail and the extra wait will only add excitement to the purchase and delivery. I hope you don’t give the seller grief and demand anything. That would be messed up and uncalled for. Anyone saying they would demand a refund and buy else where need not to veer far away from their local Amazon prime sensibilities.