I must have just been "lucky" then, when I wanted to get a replacement for my old Dell. (Probably because it's not on the retail market any longer.)
Something else to consider - it's my understanding that most recently-manufactured computers are switchable between 220v and 115v. My old Dell here was supposed to be able to do that as well, but I could never get it to work on 220v (yes, flipped the switches, etc.). I was able to buy, for about £60, a transformer that has two outlets, and that works a charm to power it. There's an (American outlet, you can't get them here that I've been able to find) extension cord on the other outlet that runs various other bits of my home electronics just fine. It seems to be currently unavailable on Amazon, but they have others that are similar