Ok, I got something together for you here, you would just need a place to order parts for this somewhere in Finland.
(Note: These parts all total to $445.93 in the US, if you can supply me with a computer shop website in Finland, or something that ships to Finland I can show you these parts from that site, for a price comparison)
CPU: AMD Athlon II X4 640
MOBO: ASUS M4A78LT-M LE AM3 AMD 780L
PSU: CORSAIR Builder Series CX430 CMPSU-430CX 430W
GPU: PowerColor AX5770 1GBD5-H Radeon HD 5770 1GB
RAM: OCZ Flex II 4GB (2 x 2GB) 240-Pin DDR3 1600Mhz
DVD-RW: LITE-ON Black
CASE: Rosewill DESTROYER Black Gaming ATX Mid Tower
TOTAL: $445.93 before shipping + tax
That should be everything you need. This rig is capable of running BFBC2 at full settings with 8x AA on any resolution up to 1920x1080, at which point you might need to turn the eye candy down.
Again, and I can't stress this enough, you need to find a computer shop where you can order from your native country. The shipping costs of all this will probably put you over your budget.
If you can lead me to a website that ships parts to Finland, I can try a build there for you and see if it will stay on your budget.