they don't compile it, but what they will do is just judge it by weight and relative size. and go on like moddersmart.com they sell tx-2 for cheap and have like 3 dollar shipping.
Well when I got my stuff, I just ordered 3 things, the DVD-RW, Mobo and PSU because Tech-Forums members gave me everything else, whereas the rest of you ordered everything else, so I guess it depends on what you order
usually if your orderign a a new computer no matter what you get shippign will be about 30/40$. is your orderign lots of items but not case, itl usually be about 20$, and they will soemtimes send it in one BIG box or 2 large ones, my order from ncix came in 3 seperate boxes, 2 boxes of components and one which was the case.