Riverna, order it online. You'll find much better prices.
Crucial Ballistix 2x1GB DDR2-800. Most likely will do 1066MHz like the more expensive 8500 kit... Starting from 66.
http://geizhals.at/deutschland/a206716.html
Crucial Ballistix 2x1GB DDR2-1066. Starting from 92.
http://geizhals.at/deutschland/a256844.html
Buy two sets of the first one I think you may do better than 2x2GB 450MHz

I've seen good comments about ALTERNATE and HPM-Computer. 4x1GB may not be 100% but I think with this Crucial RAM your chances of better OC is higher. There aren't good 2x2GB kits for overclocking...
I've been in Germany last July and bought most of my hardware in Munich. 15-20% more expensive than in US but waaaay cheaper than in Brazil. I would order everything online but I didn't have enough time to receive the items.
The memory was expensive for US/EU prices: 180 for one OCZ 2GB kit. Still, it was less expensive than in Brazil. Too bad it failed after 3 months. RMA'ed it and received new OCZ D9 RAM back. Do not fully regret buying it.
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