The Roland D-20 is a 61 key (velocity sensitive), 8-32 voice (9 part multimbral), digital synthesizer, featuring 1-4 oscillators (sample or resonant low pass filtered saw/square), dedicated pitch/filter/amp 4 stage envelopes, LFO, reverb, card slot, 128 presets, 9-track sequencer (64 patterns, 16k notes), 3.5" DSDD disk drive, and MIDI.
The D-20 makes a great budget or alternative D-50. It's more closely related to the D-10 and D-110 synthesizers but adds an 8-voice sequencer with a rhythm track. The D-20 is a digital synth that employs linear arithmetic synthesis (LAS). It's a confusing synthesis / editing method composed of tones, partials and timbres. Basically it all boils down to tricky programming which, if you know what you are doing, can have interesting and unique results. Reverb effects and internal / external memory storage are also available on the D-20. Definitely worth a listen.
Keyboard stand is included, power supply included. Speakers and speaker stands are not included however can be purchased separately for 125.00