The Cuisinart SupremeGrind is one of the least-expensive burr coffee grinders. In fact, it can be had refurbished on Amazon for under $20 (DBM-8
model), or twice that for the newer-but-nearly-indistinguishable CCM-16FR
model. The major problem with the machine is that, even at its finest, it's unable to produce an espresso grind.
However, it's actually a rather trivial operation to shim up the stationary burr to shift the grind in a finer direction.
Don't get me wrong. If you've got a great espresso machine, don't skimp here: get a Jolly or a Rocky or something like that. But if you were considering a Gaggia, a Baratza, or other low-end espresso grinder, give this a whirl: once modified, it easily compares with that class of grinder.