The last time I moved back to Amsterdam, I went to a computer store to order a new computer (I only bring my hard drives with me). I was told it would be a two week wait for a new one to be built to my specs. After patiently waiting three weeks I was told it would be at least another week! You can imagine my frustration not having a computer for such a long time...
So I did what any former computer techie would do. I marched down to Overseas Computers, told them what I needed. They handed me the parts, I took them home in a taxi, and within ONE HOUR, I had my new computer up and running! Why did I wait? Not only did I get ONLY what I wanted, when I needed it, but they saved me some money, too.
Over the years I've been to Overseas Computers a number of times, and they usually have what I need, at a reasonable price. No B.S. Just pickup their current price sheet, or visit their website to see the savings.
While they might not have such a wide selection of ready to go computers and accessories as Media Markt, they certainly have better deals on loose parts. Also their staff is far more knowledgable than most salesmen in electronics stores. And from what I've seen, they're pretty good about taking things back, unlike Media Markt (where you must PROVE to them the item doesn't work!).