Vortex Sound Research

Hi, as the title already suggests I am trying to buy my first synth. As they tend to be quite pricey, I want something not so expensive for the first time, since I am not sure if all this is for me.

I found a decently preserved yamaha cs1x and I am wondering if the price of 150€ is a lot for this kind of synth or do you guys think it's worth the price.

Thanks!