i found one called e-shop.gr for prices. if you can find a local computer store that does better pricing or has better customer service then i would use that one.
INTEL CORE I5-3470 180.00
ASROCK FATAL1TY Z77 PERFORMANCE 131.00
CORSAIR CMX8GX3M2A1600C11 XMS3 8GB (2X4GB) DDR3 1600MHZ PC3-12800 DUAL CHANNEL KIT 52.00
XILENCE 700W GAMING SERIES PSU 119.00
ASUS VENTO TA-822 30.00
AEROCOOL VS-3 BLACK 50.00 if you like something with led.
HGST HDS721010CLA332 1TB SATA2 71.00
ASUS GTX650TI-1GD5 1GB GDDR5 PCI-E RETAIL 160.00
if you can fine intel i5 cheaper like the i5-3330 ones that have the intel 2500 gpu and not the 4000 you may be able to save some cash. the lowest intel cpu would be an i3. any lower and your cpu will bottleneck the gpu card. if your going to play some high end games i would by the 7870 or 660/600ti cards. there going to be the best value for gaming cards. A ssd will speed up your system but for a low cost system you can always add it latter.