Chayro, there are so very many recordings of this work (Bach unacc. vln.) that it's mind-boggling to open up a discussion of which are the best ones. That said, I believe the two Heinrich Szeryng recordings are very highly regarded as far as "old-school" players go. My favorites are later artists who take the more "period" approach--Sergiu Luca, Rachel Podger and my absolute favorite, Lucy van Dael. Having heard her recordings with Baroque set-up (instrument, strings, and bow) it's now harder for me to listen to modern versions. YMMV, but you might want to check out some Szeryng and some van Dael.
Bach Unaccompanied Violin Sonatas-Johanna Martzy
Both TAS and Stereophile have published articles about the vinyl reissue of these recordings by The Electric Recording Company at the staggering price of $470 per disc (yes, you read that correctly). Is anyone aware of CD reissues of these recordings in high quality sound? If so, could you please reply with the details (label, album number)? Also, a comparison of the original vinyl to CD reissues (if such reissues do in fact exist in good sound) would be most helpful. Thanks.