+1 on the Rancilio Silvia. It's the cheapest actual espresso machine you can buy. The rest aren't the real thing; they're missing stuffs. However the Solis Maestro will do the espresso grinding job pretty damn decently for $100 reconditioned, $150 new.
For *really* cheap, though it's more like the output of the lesser espresso machines and technically it's espresso strength coffee, I recommend the
Aerobie Aeropress very highly.