Theres a really cool buying section on German eBay called Analoge Instrumente which is worth checking. It often has bargains on it if you're prepared to take the risk with shipping. Sometimes it has some very unusual synths on it, like this one which I have never heard of before.
From the seller in googlish
"Tiracon 6V (VEB automation systems Cottbus)
6 voice polyphonic polyphonic synthesizer
VCO Waveforms: Saw 4 'square and 4', 8 'and 16'
VCF: 24 dB low pass filter with adjustable resonance
3 LFO's: one for VCO, VCF and pulse width
32 program memory locations
Sequencer with two lanes for 250 notes
Chord memory function
Tape recorder interface for backing
Midi in out and thru
Weight 14 kg"