I have 4 rigs I'm currently trying to sell, but I'm in the US. I checked USPS express international though, and they list 3-5 days shipping time to Finland so that's still within your time frame.

All 4 rigs are AMD Sempron 140's with 1GB of ram, ASRock motherboard with 2 PCI slots. Three of them have dual 6950's pushing 350 mhash/sec each (700 total per box) except one 6950 that is only stable at 850MHz so it pushes 335. Those three have a 750 w power supply. Then I have a fourth that has two 5870s and an 850w power supply. The 5870 rig isn't even fully built yet so I don't have numbers for mhashes yet (the mobo for that comes in tomorrow).

If you're interested, we can try to work out something, and I can provide whatever proof you'd like. I checked the shipping costs and the price for an entire rig is probably about 4 BTC (I have to check the exact sizes). Shipping for a single video card is about half that.