The Sasha 2 to my ears was only marginally better than the Sasha. If the overall difference was 10 percent, I would be surprised. I cannot pinpoint a specific area where the Sasha 2 was significantly better, although someone who has owned both might be better qualified to answer that one.
The cost used, however is about a 33 percent differential. Both are bargains at used prices but especially the Sasha which should cost in the range of 12k used in excellent condition--frankly a ridiculous sum for a speaker of such outstanding quality. So, ultimately it is a question of how much you are willing to pay for that degree of improvement. The law of diminishing returns applies, a law which I have consistently violated in my audio purchasing career. BTW, I have owned Sophias, WP7s, Sashas and now Alexia2s with all ARC reference equipment during ownership of all.
The cost used, however is about a 33 percent differential. Both are bargains at used prices but especially the Sasha which should cost in the range of 12k used in excellent condition--frankly a ridiculous sum for a speaker of such outstanding quality. So, ultimately it is a question of how much you are willing to pay for that degree of improvement. The law of diminishing returns applies, a law which I have consistently violated in my audio purchasing career. BTW, I have owned Sophias, WP7s, Sashas and now Alexia2s with all ARC reference equipment during ownership of all.