Roland VP-9000

images via this auction
Not the best shots, but you definitely don't see these often. I believe the VP-9000 was the synth that kicked off Roland's Variphrase technology which made its way into the VariOS and then the V-Synth.

Check out this post for a link to an excellent VP-9000 resource site. Note that this post and that are the only VP-9000 posts on MATRIXSYNTH today. I post what I come across and what people send in, so that gives you an idea of how often these come up. If I remember correctly the price was very high on these and they had a number of technical issues.