Not sure, but dont do that. Our prices are much higher than the US, plus shipping etc.
There must be places similar in the US you are a HUGE country. Yes buy a ready built system from somewhere similar.
I ordered a relative a ready built overclocked system, from
www.overclockers.co.uk and paid with bitcoin, as they accept! It was built and cable managed beutifully with all the bast cables and colour matched parts, cooling tubes etc. A work of art that you could only do if its your day job! Better than I could do, because thay have all the options sat on racks to look at! And they done it before.
You can still add your extra disks, etc afterwards.