I sold my Syrinx a couple of years ago for £2500, it was a Red one and went here www.somastudios.com
It is a really nice little synth, the key feature to it is the filter section. You have 2 BPF and an LPF, you can make some great sounds here, lots of Vocal type stuff, think of early Air tracks.
I sold mine to fund my big modular I had, I could create the same sort of stuff with multiple filters on that.
Really not worth the money if you have a modular system, only buy one if your collecting.
The little metal mod plate is also REALLY weird to use.