That really is a lot of money . Oberheim synths were plagued with reliability problems when they were new , now that it's well over 25 years old , you know it hasn't gotten better . It is unique in the fact that each of the 4 voices can have it's own tone and envelope settings . You have to remember that it's not rare because OBERHEIM ment it to be , it's rare because it was a poor seller . It was too expensive , and the YAMAHA CS-50 , CS-60 , CS-80 , MOOG POLYMOOG , ROLAND RS-505 simply out sold it . Also The SQUENTIAL CIRCUITS PROPHET 5 was right around the corner . It's cool , but it ain't $4,300 cool .