I bought mine for about 500GBPs, got it serviced and modified by Circuit Breakers for 200GBPs and it was well worth it! The extra stuff you need like a CV controller, etc. You have to consider it unless you are really good at CV control with an already existing A4.
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Lastly, I have to say that it is one of the most accessible synths out there. You can also use the very great emulation D16 LuSH-101 to great effect but the sound on this little hardware unit is purely awesome.