Originally Posted by bermuda
The Alesis PercPad is small, cheap ($99) has 4 pads and a pedal input, and has 25 assignable sounds including "electronic" kicks & snares (no cymbals though.)
For an extra $100, the Alesis Sample Pad lets you load your own sounds from an SD card (about 3min of sound in mono files, should be plenty for basic drums & cymbals.)
Those are the best deals going on a small, self-contained, inexpensive unit, unless you can find a used Roland SPD-S for cheap, but still probably won't be close to $100.
+1, I bought the percpad and really like it............it does have a limited amount of sounds, but works great for me.