This volume is a bargain at any price, and at this price, it is an exceptional find. It contains every sonata Corelli wrote (Opus 1-5), giving anyone interested in playing Baroque chamber music a lifetime's worth of beautiful compositions to explore. The format is large and the music itself is clearly printed and extremely readable. Though it is fully bound, it easily opens completely, allowing perfect performance copies to be made. Even if you don't think you will ever play more than a handful of the sonatas, the total collection is a pleasure to have in hand to follow along while listening to Corelli's work. I won't take the time here to sing the many praises of Corelli's music, but suffice it to say, his trio and solo sonatas are the standard by which all Baroque sonatas are measured.