Real espresso is a combination of freshly roasted beans properly ground and pressed at high pressure using 200 degree water. When you do that, you produce something so delicious it'll blow your mind if you love coffee. When purchasing equipment to do this at home, the most crucial of these three factors is in many ways the grinder. You need to be producing a very exact, very fine grind that doesn't include larger chunks (it'll mess up the pressure, because water will "channel" here) nor coffee dust (which will end up in your cup). And you kinda' want a grinder that won't break.

There are surprisingly few grinders sold that meet these requirements. Some espresso drinkers try to get by with one of the only two grinders under $150 which can sometimes manage this: the Solis Maestro and the Capresso Infinity. Whether you succeed will depend a lot on whether you got lucky, and you got one that happens to be put together well. Both make use of plastic parts which will fail over time. Some people buy the Solis Maestro Plus for $150 -- it's heavier than the Maestro, but otherwise no better: you're really wasting your money. The next step up is the Gaggia MDF. It usually sells for around $200, and the Amazon price tends to fluctuate, actually coming in under $200 some of the time with promotions, which makes it a wonderful bargain, though that may be hard to fathom for folks used to a $20 whirly blade grinder. The MDF used semi-commercial grade steel burrs in a semi-commercial (and hence longer lasting) burr set. It will produce the even, fine grind necessary for espresso, and when paired with another Gaggia, or a Solis or Rancilio or FrancisFrancis machine, you're ready to be a home barista and blow the minds of your friends. If you've got a bit more money, I'd recommend the Rancilio Rocky, which typically sells for $280: it's quieter and more rugged. Up from there would be the Mazzer Mini for around $360, which should last you 20 years. But the MDF is probably the best bargain going for being a true home barista.