Shopping - Windows Vista Home Premium Student

Yesterday I finally got bored on my Windows XP Professional (and the problems I had with it) and went to a local computer shop. My purpose was to buy a copy of Windows Vista Home Premium Student (Upgrade), but there was a surprise waiting for me... First I was just roaming between the shelves searching for a nice little box (that one where Vista is packaged inside) but only I could find was a Windows Vista Ultimate box. Its price was 300€ and compared to the one I was going to buy (104€) it was a little bit too much for me. So after all I had to ask the busy salesman if they happen to have any copies of Home Premium Student in their stock. There wasn't. I asked if there is one in some other shop near to my town (There's at least five of them (and a dozen not so far away...)) but they had none. I was amazed and decided to order one. I was thinking that it would take three to four days for my OS to ship, but they said that it will take at least one week! Now I'm waiting for my OS and I can hardly work on my machine with the older version of Windows (There's many explanations to that but they're not important). Of course I could reinstall Windows, but it would take hours to reinstall all the drivers and other important stuff. I just have not enough time. And yes I live in Finland, it really shouldn't take that long for a product like that to ship...