In the US, you don't even have to do that. I bought a mountain of computer stuff in Taiwan while I was staying there and brought it home in the original boxes. On my way through the "nothing to declare" line, the customs guy asked what's in the boxes. I told him, computer stuff. He said "go".

I did use the stuff in Taiwan for about a year, so I didn't think I'd have a problem, but I don't think they care unless you're smuggling in stuff.