Fallout 3 GOTY and Fallout:NV Ulitimate are available on Steam for 4,99 EUR.
http://store.steampowered.com/sale/quakecon1?snr=1_41_4__42
I highly recommend getting these games if you like other Bethesda RPGs or just RPGs in general, it's really a steal at this price. For reference, I clocked a 1000+ hours in Fallout 3 and as of now 871 into New Vegas, they're just FULL of content out of the box, not to mention the ENDLESS supply of mods you can get from the community.
Since Bethesda games are notorious for their bugs, drop me a PM and I'll give you a list of a few essential mods that you should play with.